Sibill was born in Godsbrigg, Scotland, the daughter of William Beall and Unknown. The date is not known.
She has died but the date and place are unknown.
Her husband was Fergus Graham, who she married in 1624. The place has not been found. Their four known children were Richard (c1580-1653), William (?-1631), Reginald (?-<1685) and Francis (1614-?).