Conversation so far:
How many times did Harriet Tubman get married?
Harriet Tubman was married twice.
When did she get married to John Tubman?
Around 1844, Harriet Tubman married a free black man named John Tubman.
How many children did Harriet Tubman and John Tubman have?
Harriet Tubman had one adopted child, Gertie.
How did Harriet Tubman and John Tubman meet?
When did Harriet Tubman first run away?
Harriet Tubman and her brothers escaped from slavery on September 17, 1849.
Can you tell me anything else about Harriet Tubman's family?
Harriet Tubman's mother Rit was a cook for the Brodess family. Her father Ben was a skilled woodsman who managed the timber work on Thompson's plantation.

Question: Why did she change her name?
Self-contained rewrite: Why did Harriet Tubman change her name?