Question: When did Margery Byset's husband die?
Sentence (from "Eòin Mòr Tànaiste Mac Dhòmhnaill"): Eòin Mòr Tànaiste Mac Dhòmhnaill, aka John Mór Tanister or "Iain Mac Dhòmhnaill", Gaelic lord, died 1427.
Relevant evidence: Yes