Question: When did Margery Byset's husband die?
Sentence (from "Margery Byset"): Margery Byset (Bisset, Bissett; also Marjery, Margaret, Marie) was an Irish noblewoman belonging to the Bissett family whose marriage to John Mór Tanister MacDonnell in 1399 laid the basis for the Clan Donald claim to the Glens of Antrim, the lordship of which her family had established in the 13th century.
Relevant evidence: Yes