What was the name of Hannah's husband?

Answer: Elkanah

Elkanah of Ramathaim-zophim had two wives, Hannah and Peninnah. Peninnah had children, but Hannah had none.

“Now there was a man named Elkanah who was from Ramathaim-zophim in the hill country of Ephraim. He was the son of Jeroham, the son of Elihu, the son of Tohu, the son of Zuph, an Ephraimite. He had two wives, one named Hannah and the other Peninnah. And Peninnah had children, but Hannah had none.”— 1 Samuel 1:1-2 (BSB)