Matthew Bellamy and Kate Hudson

Five days after welcoming their first child together, Kate Hudson and fiancé Matt Bellamy have named their newborn son.

"So happy! Just had a baby boy, Bingham "Bing" Hawn Bellamy. Born 7 Ib., 12 oz.," Bellamy tweeted Thursday. "Mum and baby are strong and healthy. Mum was a warrior, Bing popped out after 4.5 hours of intense pushing!"

It's a boy for Kate Hudson and Matt Bellamy

The Muse frontman, 33, later explained the baby's name: Bingham is his mom's maiden name and Bing is the name of Hudson's granddad (father of Kurt Russell). "Family connections all round," he wrote.

Bingham is the first child for the couple, who started dating last year and became engaged in April. Hudson, 32, has a 7-year-old son Ryder, with ex-husband Chris Robinson.

What do you think of the name?