I like to use themed names for the groups of chickens
Last year's light Brahma pullets (russian popular songs)
Kalinka
Katyusha
This year's light Brahma pullets and cockerels (Norse mythology)
Njord
Bragi
Hel
Frigg
Freya
Idun
Skadi
This year's bantam Cochin pullets and cockerels (desserts)...