Conversation so far:
Who did Tubman marry?
she married a free black man named John Tubman.
When did they marry?
Around 1844.
Did they have any kids?
CANNOTANSWER.
Where did they live?
little is known about him or their time together.
What else is significant?
By 1840, Tubman's father, Ben, was manumitted from slavery at the age of 45, as stipulated in a former owner's will.
Was her mother a slave?
Rit, like her husband, would be manumitted at the age of 45.

Question: What else is notable about her family?
Self-contained rewrite: Besides her mother Rit being manumitted at the age of 45, what else is notable about Harriet Tubman's family?