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Dathí indecl. npr. m.interchanging withNathí.
40FORMS:—
A Nathíi n s. Trip. 446. 8 ; 448. 8 .
Nahii n s. Fél. Oeng. Aug. 9 LB.
Nahi g s. BB 199 b 1 . LB 17 e 16 .
Nathí n s. LU 38 a 7 . CS 20. 16 . LL 313 a 9 f.b.
45 313 a 18 , 32 . 314 b 2 , 22 . Fél. Oeng. Aug. 9 (MSS
B, L).a s. LL 132 b 4 .g s. LU 38 a 1 , 8 , Rawl. 86 b 12 .
MacCarthy 212. 2 (LL). LL 314 b 15 , 50 . 313 b 4 f.b.
Nathi n s. AU i 10. 11(A.D. 445). CS 18. 1 f.b. Mart.
Don. Aug. 1 , Aug. 9 , Oct. 28 . FM i 128. 7(A.D. 430).
50 LU 38 a 2 , 14(margin). YBL 192 b 25 , 32 , 42 . Fél. Oeng.
Aug. 9 (MS R1). Trip. 32. 12 ; 30. 18 .Nati BB 197 b 5 .
a s. YBL 191 b 42 .g s. AU i 20. 9(A.D. 463). YBL 192 b 43 ,
48 . Trip. 136. 14 . BB 137 a 22 . MacCarthy 396. 17 (BB).
Lism. L. 4637 .d s. LU 38 a 15 margin .
55 Nathe n s. Fél. Gorm. Oct. 28 . Mart. Don. Oct. 28 . —
Comp. furtherNahie ACMN 70 . B
Dathíi no instance.
Dathí n s. LU 38 a 26 , 28 . Cóir A. § 146 (twice).g s.
LU 38 a 10 , 17 . Lism. L. xv 12 .d s. FM i 128. 2(A.D.
60428).
Dathithe common Mid.-Ir. spelling.n s. LU 38 a 22 .
38 a 10 margin . YBL 191 b 13 , 20 , 21 , 23 . 192 a 4 . 192 b 22 .
Lism. L. 2706. 2710 .g s. AU i 22. 6 (but only in the MS
marked as A). Mart. Don. 62. 20 ; 54. 11 , 13 ; 130. 23 , 25 ;
65 350. 2 f.b. RDinds. §§ 133 , 160 (twice). YBL 191 b 35 .
192 b 48 . Rawl. 86 b 35 . RC ii 86. 1 f.b. (LU); 88. 1 .
MacCarthy 212. 2 (BB); 426. 4 f.b. (BB).d s. YBL
191 b 29 .
Dahíphonet. =Dathí.n s. YBL 191 b 49 .g s. Dahi BB
5 57 b 22 . 58 a 40 .Cf. Dahye ACMN 64 .
Dáthí n s. Cóir A. § 176 .
Dáthi g s. ALC ii 448. 22 . LL 139 a 47 .
C Athi in late MSS, wrongly abstracted fromNathi
(understood asn-Athi) and such phrases asbidathí a ainm,
10 Cóir A. § 146 =bid Dathí,&c.
Already in the 11th century the meaning and origin of
the name had become obscure to the Irish grammarians;
and no wonder, for as anpr. Nathíbecame obsolete as early
as the 6th century. It was associated withdaith,daithe,
15 swift,swiftness (and thenpr. Daithe,Daithem,Daithen) as
is clear from the marginal note LU 38 a :is de atberthea a
nainm sin fris conid Dathi a ainm óndní is dathi gabálaid
(ó daithi a gabáltais YBL 191 b 20 , where the note has
been adopted in the text),cf. Cóir A. § 146 . The length
20of the final -í is attested by the archaic spellingNathíiand
the rhyme withtrí, MacCarthy 212. 2 (LL).Dathías the
later form originated from the confusion of the N- ofNathí
with the eclipsing n- after a preceding accusative or neuter
noun:tech Nathí(understood ast. nDathi), babtizauit
25Echaich mac Nathí (mac nDathi) &c. ToNathías the
older form points also the alliteration with n- in old poetry,
e.g. MacCarthy 212. 2 (LL):cethri cóic bliadna 's a trí:
rogiallad do niurt Nathí(v.l. Dathi, BB):i Sléib Elpa na
narm nán,&c.I have no example ofDathíalliterating with
30d- from old poetry. The accent falls on the ultimate,cf.the
alliterationNa-thí:tolchar LL 150 b 30 , 31 b 45 . With
Nathíishould be compared thenpr. f. Daríi, the authoress
of theCáin Daríi; -íi seems theg s.of anpr. m.the nom. of
which would be Old-Ir.Eo, identical with the tree-name (cf.
35thenpr.given by Meyer, Sitzungsberichte 1912 xxxviii 798 ).
This name actually occurs TBC 4870 :co hEo mac Oircne.
LL 94 b 7 f.b. :co hEo mac Forne. Thegenitive Íi,Íoccurs
in the npr.Mac Hííin the Oir. text Anecd. iii 61. 6 ,Mac
Hí(the name of a deacon) LL 366 e 11 . Compare the ivo-
40of Ogh.IVOCATTOS(Eochad),IVODACCA(†Eodach, not
Uadag, as Macalister thinks, Epigr. iii 180 ), Gaul.IVORIX
in a memorial inscription from Bordeaux.Nathíi`the
nephew of Eo
,' then, would be (†) in Ogh.NETTA IVI (NIOTTA
IVI) of the nephew of Eo, and in the book of Armagh †Nioth
45Íi,Niath Íi(cf. Nioth Fráich Book of Armagh 15 b 2 ,Niath Taloirc 25 b ).
FordarofDar-Íi cf. darandder; the parallelism between
Nath-FráichandDer-Fráich(niece of Fraech ?) is note-
worthy.
Nathí mac Ailello BB 130 a 22 .
50 Nathí mac Bresail Einecglais BB 131 a 37 . 138 a 3 .
Nathí mac Brocáin grandfather of the Druid Nuadu
mac Achi
RC ii 86 1 f.b. :DathiLU,Daithi YBL 175 b 32 .
After him or one of his ancestors probably was named the
Tuath Dathi in Brega, RC ib.
55 Nathí mac Bróin BB 112 b 26 .
Nathí mac Caille BB 177 d 28 .
Nathí mac Caithri BB 143 b 24 .
Nathí mac Caur BB 145 c 40 .
Nathí mac Conaill Gulbain, Fen. p. 433 b .
60 Nathí mac Crimthainn LL 45 b 32 . BB 136 a 11 .
137 a 18 . 138 d 5 .
Nathí mac Daigri BB 144 e 28 , f 4 .
Nathí mac Dolbaig BB 131 b 23 .
Nathí mac Echach BB 131 a 26 .
65 Nathí mac Fiachrach=Feradach mac Fiachrach(his
first name according to Cóir A. § 146 ).The last pagan king
of Ireland, nephew
( ACMN 66 )and successor of Niall of the
Nine Hostages and father of Ailill Molt
; killed by lightning
at the AlpsA.D.445(AU), 427(ACMN), 428(FM , CS). (a)
5Annals and chronicles: AU i 10. 11(A.D. 445); i 20. 9
(A.D. 463: inicium regniAilella Muilt mic Nathi); i 22. 6 .
ALC ii 448. 22(A.D. 1582)(Cathal Dubh mac Conchobair
of his race). FM i 128. 2(A.D. 428). CS 18. 1 f.b.
(A.D. 412), 20. 16(A.D. 428). Mart. Don. 54. 11 , 13
10(Colga NaemandCronán mac Aongussaof his race); 62.
20 ; 130. 23 ; 350. 2 f.b. (LochanfromCell na Manachof
his race). (b) Cóir A. § 146 (etym. explanation of his name,
see above).Aided Nathí LU 38 a 1 ( YBL 191 b 13 sq.),
2 , 7 , 8 , 10 , 17 , 22 , 26 , 28 . YBL 191 b 13 , 20 , 21 , 23 , 29 ,
15 35 , 42 , 49 ; 192 a 4 ; 192 b 22 (where buried), 32 , 42 .
Nathi mac Fiachrach gabais flaith nÉrend i ndíaid Néill,
ib. 192 b 25 .Ailill Molt mac Nathi, ib. 192 b 43 (Dathi, 48 ).
LL 132 b 4 (death of N.). BB 108 a 12 , 53 (Nathi=Dathi,
ib. 38 , 107 a 17 ). 216 a 28 . Trip. 136. 14 . RDinds. § 133
20 MacC. 212. 2 ; 396. 17 ; 426. 4 f.b. Rawl. 86 b 35 .
Nathí mac Garrchon of Leinster (grandson of Fothad),
the opposer of Patrick at Inber De. Trip. 30. 18 ; 32. 12 ;
446. 8 ; 448. 8 ..vii. meic Garrchon...Nathí,&c. LL 313 a 18 .
BB 124 a 39 . FM i 128. 7(A.D. 430).
25 Nathí mac Luigdech son of Lugaid mac Dalann and
father of Barr mac N.
Lism L. 4637 .Mochua Balla,
whose life is told Book of Lism. 40 a 1 sq., was a great-
grandson of his; he died A.D. 637. The death of Nathí
mac L., then, took place probably in the middle of the
306th century.
Nathí mac Maeláin BB 143 b 9 .
Nathí mac Meldae LL 316 c 39 .
Nathí mac Rossa Failge:sé meic Rosa Falge .i.
Nathí,&c. LL 314 b 22 . BB 130 a 7 .
35 Nathí mac Sechnaig bishop of Cúil Futhirbe, Mart.
Don. Oct. 28 ,cf. Fél. Gorm. Oct. 28 .Nathi epscop C. F.,
Fél. Gorm. Aug. 1 . Mart. Don. 208. 3 sq. Nathí Cúile
Fothirbe LL 313 a 9 f.b.
Nathí mac Trichim son of Erc Dáire, Fél. Oeng. 56.
403 . BB 220 c 12 .
Cruimther Nathí of Achad Conairi in Leinster, a con-
temporary of Colum Cille
, Fél. Oeng. &. Gorm. Aug. 9 .
Mart. Don. Aug. 9 . Lism. L. xv 12 ; 2706 , 2710 .
Nathí a deacon LL 336 e 6 .
45 Hui Nathí:Bríon mac Echach mic Dáire...is dia
chlaind ind Echach sa húi Nathía quohúi Connachtaig
LL 313 b 4 f.b.
Bile Dathi one of the six wondrous trees of Ireland:
bili Dathi, RDinds. § 160 . LL 199 b 61 ;unnius immorro
50Craeb Belaig Dathi, RDinds. § 160 . Hardly here,cf.the
parallel formBile(Craeb)Daithin(Daithen).Vide1 and
2 Daithen.
LOC. Belach Dathi LL 200 a 10 . RDinds. § 160 .Tulach
Dathi MR 152. 8 ; 254. 11 .

55 Dathnat ā,npr. f. D. ¤ ben Chellaig BB 140 a 36 . SG
ii 497. 30 .

Dathó gen. npr. m.(:dó IT i 98. 1 . :gó, ib. 107. 2 ,
both from LL).mic Datho, Lec. 442 a 2 , 5 ; 585 b 6 .
-a- short (Dáthó ML 15 n. ; Hib. Min. p. 51 ). Wrong
60etymology by Windisch IT i 93. 2 f.b. Possibly for older
†Nath-ó,cf. Dath-íandmic nDathóó,cf. Anecd. v 16. 18 .
—Only inMac Dathó IT i 96. 1 (sicMS); 97. 6 , 11 ; 99.
9 , 22 ; 105. 18 , all from LL. ML 15 n.

dathugud u,m. vn.ofdathaigid. I Acolouring, a
65 dyeing, apainting :ic tennad a tairṅgi...ic dathugud a
degclár ic sudigud a seolchrand painting its strong side-
boards
TTr. 137 .croicne reitheadh arna ndathughad dearg,
BedelEx. xxv. 5 .ni hada leosum fir a næintigh fria
dathugud éduigh in the same house in which cloth was
5getting dyed
Lism. L. 4065 .ag cur olna chun dathuighthe
ann, Prátaí M. Taidhg. breacṡolus na maidne gá dhathú-
ghadh le coinnle geala, Mac F. Duibh p. 48 .
II Adorningwithprecious metalsorstones (cf. s. 1 dath
II
):in airc...iarna dathugud don dergór LB 123 a 46 .
10 IIIMetaph.acolouring, what serves toconcealthetruth :
ní ḟuilid saṁail na dtobar so i nÉirinn anois ┐ ní ṡaoilim
go raibhe i naimsir Chambrens acht na hiongantais seo do
chur síos mar dhathughudh ara bhreugaibh, Keat. i 18. 27 .—
dathugud LL 188 c 42 :diromnaibter littre .i. saebchiall
15estib nó cena ndathugud, seems a mistake fortathugud
(sicYBL, RC xxvi 45 n. 1 ).
MOD.dathughud acolouring,dyeing , Lhuyd. P. O'C.
Con. O'R. Dinn. (who also gives the metaph. meaning
`colouring' of cards,i.e. a magical power of getting the best
20cards
).Cf.the derivationdathughuchán,dathúchán,a
dyeing,dyeing-stuff (Munster), formed likeluigheachán,
suidheachán.— Sc.dathachadh, Macd.