Roughly a year after proposing at Pelican Hill in Newport Coast, California, married his wife, Hannah, on May 21, 2023 in Mesa, Arizona, a little over 10 miles northwest of Scottsdale, where the 2023 NCAA Championship was contested at Grayhawk Golf Club from May 26-31.

He and his wife attended rival high schools in California (Ontario Christian for William, Western Christian for Hannah) and met after one of William’s basketball games their junior years.

Favorite sports team is the Phoenix Suns (NBA).

Taught himself to juggle eggs by first juggling golf balls; he was bored at school one day, found a how-to video on YouTube, pulled a couple golf balls out of his bag and taught himself to juggle within a half hour.

Also taught himself to ride a unicycle over the course of two weeks in middle school.

Parents, Billy and Michelle Mouw, own and operate Billy’s Egg Farm in the family’s hometown of Chino, California roughly 35 miles east of Los Angeles; they celebrated their 30th year in business in 2022.

Teammates at Pepperdine University included Sahith Theegala (2019-20 season), Clay Feagler (2019-21), RJ Manke (2019-21), and Joe Highsmith (2019-22).