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- Born: About 1167
- Marriage (1): DE BRUS, Robert in 1183 1
User ID: K75.
Isabel married Robert DE BRUS, son of Robert DE BRUS 'le meschin', Lord of Annandale and Unknown, in 1183.1 (Robert DE BRUS was born about 1163 and died 1191(dvp) 1.)
"Robert, married in 1183 Isabel, natural daughter of King William the Lion by the daughter of Robert Avenel. He died s. p. before his father in 1191, in which year his widow married Robert de Ros."
from Scots Peerage (vol 2) 1
e-books, The Scots Peerage ed. Sir James Balfour Paul vol. 2 (1905).