Middle name for Calla?

Kasey • 33yo Married to my best friend 2+ yrs of negatives before 💙 Dax 9.7.17 2+ yrs of negatives before 💙 Stellan 11.29.2020 Hoping & praying for sticky baby #3

Need help with a mn for Calla. Nothing too common. I like Fern (late MILs name). But it sounds too close to California.