Isabella married Robert III de Brus in 1183. Robert (son of Robert de Brus, 2nd Lord of Annandale and Euphemia de Crosebi) was born in 1140 in Annandale, Dumfries-shire, Scotland; died in 1191 in Annandale, Dumfries-shire, Scotland; was buried in Guisborough, Yorkshire, England. [Group Sheet] [Family Chart]