When I had a larger flock (40+) it was almost impossible to name them all, so I only named my favorites or ones that clearly stood out. But when I had small flocks less than 10 (like I do currently) I generally name them after people or film characters depending on their personality/vibe or color. For example, my girls are:
Aurora (Porcelain D'uccle)
Maleficent (Mille Fleur D'uccle)
Cruella (Mottled Cochin bantam)
Regina (Green Queen EE Bantam named after a character on Once Upon a Time)
Rosalìa (EE bantam, after Spanish singer)
Isabella (EE bantam, I might change her name but she's a pretty blue/silver penciled color)
Mary Margaret/Mulan/Silkie (Paint Silkie, that we can't decide on a name...I like Mary Margaret bc of the OUAT show and how that character was not necessarily pure hearted LOL. Paint is not pure white so

)
Luna (silkied Serama, named after Luna Lovegood in Harry Potter)
Sweetie (smooth Serama, just bc she's a sweetheart)
Bindi (silkied Serama, named after Bindi Irwin).
I once named my favorite hen Mary Poopins, but she since passed long ago