Roger de Montgomery Count of Alençon, Earl of Shropshire of Shrewsbury, of Alençon de Bellesme. (~1022 - 1094)	Muirchertach II O'Brian King of Ireland (~1030 - 1119)
Mabel de Talvas d' Alençon Comtesse de Balleme et Alencon (1026 - 1079)	Dubhchobhlaigh of Ossory ( - 1098)

Arnulph de Montgomery

Iafracoth (Lafracoth) O'Brian

b. abt 1062, guess d. bur. occ. cen. im. . ud.

b. abt 1076, Munster, Ireland d. bur. occ. cen. im. . ud.

Children

Alice de Montgomery Philip de Montgomery

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