Who was Harriet Greene's husband?

Harriet Greene was the mother of Araminta Ross and eight other children.  Araminta Ross later changed her name to Harriet Tubman and would go on to lead nearly one hundred people to freedom from slavery using the Underground Railroad.  

Harriet Tubman's mother, Harriet Greene, was a slave who married a man named Benjamin Ross.  Ben Ross was also a slave at the time.  They married informally in the early 1800s and she became Harriet Ross.  Araminta was born in 1822.

Ben Ross was eventually freed.  He took a job and worked hard to save money. He used the wages he had saved to free his wife, Harriet.  He saved up $20, which was an amount equivalent to approximately $2,500 in today's money.  He used this money to buy Harriet's freedom.