EUSTACE

(Ginel Iusdasach.)

Lords Portlester and Viscounts Baltinglass.

Arms: Or, a saltire gu.

Crest: A stag statant, betw. the horns a crucifix, all ppr.

Supporters:  Two angels ppr.

Motto:  Cur me persequeris?

Donchadh, a brother of Tadhg [Teige] who is No. 106 on the "O'Brien" (of Thomond) pedigree, was the ancestor of MacIusdais; anglicised Eustace.

106. Donchadh: a son of Brian Boroimhe, the 175th Monarch of Ireland.
107. Pór (or Pur) of Raithear Pueurnuigh: his son; a quo O'Poir or O'Puer ("pór," gen. "poir": Irish, seed, race, or clan), which became Le Poer, modernized Power.
108. Bened of Raithear Beneudaigh: his son.
109. Iusdas (i.e., Lucas): his son; a quo MacIusdais ("ios" or "fios": Irish, knowledge, and "das," a desk), and MacLucais ("luach": Irish, reward, and "cas," hasty; Heb. "chush"), anglicised Lucas.
110. Muiris: his son.
111. Nioclas: his son.
112. Risdeard: his son.
113. Tomhas: his son.
114. Alasder: his son.
115. Uilliam: his son.
116. Sheon: his son.
117. Sir Eadbhard: his son.
118. Tomhas: his son.
119. Risdeard: his son.
120. Margreagach: his son; had three brothers - 1. Eamon, 2. Builter, 3. Tomhas.
121. Robeard (or Robert) Eustace: his son; had four brothers - 1. Alaster. 2. Sheon. 3. Risdeard. 4. Another Robeard.

REF:
'Irish Pedigrees' by O'Hart, Volume 1, Page 87, dated 1892, reprinted 1989.