Conversation so far:
Who was Thomas Malory?
Sir Thomas Malory was an English writer, the author or compiler of Le Morte d'Arthur, the classic English-language chronicle of the Arthurian legend, published by William Caxton in 1485.
Are there any other interesting aspects about the Thomas Malory article besides being an English writer, author of Le Morte d'Arthur?
A second candidate was presented by A.T. Martin, who proposed that the author was Thomas Malory of Papworth St Agnes in Huntingdonshire.
Who was Thomas Malory of Papworth's mother?
This Thomas Malory was born on 6 December 1425, the eldest son of Sir William Mallory, who had married Margaret, the widow of Robert Corbet of Moreton Corbet.

Question: Did he have siblings?
Self-contained rewrite: Did Thomas Malory of Papworth have siblings?