Conversation so far:
Was John Dee married?
Dee was married three times.
did John Dee have children?
Dee had eight children
who was John Dee's first wife?
He first married Katherine Constable in 1565
who was John Dee's second wife?
His second (also childless) marriage to an unknown woman lasted only a year until her death in 1576.
did John Dee in his second marriage to an unkown woman have children?
His second (also childless) marriage to an unknown woman lasted only a year until her death in 1576.
did John Dee attend school?
He entered St John's College, Cambridge, in November 1542, aged 15, graduating BA in 1545 or early 1546.

Question: who was John's third wife?
Self-contained rewrite: who was John Dee's third wife?