My first flock of 10 was all named.
Rudy was the Rooster
2 Light Brahma hens Sunshine and Snowball
3 Silver-Laced Wyandottes Flash, Martha, Dopey
1 Buff Orpington Zoie
1 Buff Rock Maize
2 Red-Sex Links Lucy and Ethel
The next year I added 4 RIRs Jo-Jo, Penny, Rhoda and Crumpled Napkin (there is a story there)
and 2 Golden Stars Daisy and Mae
Most of the names were linked to personality or color. The third year is when I purchased the 40 peeps, half delawares and half australorps. Since so many looked alike I no longer named them, but a few always stand out and so three roosters ended up with a name and a little australorp stood out and befriended my daughter, so she called her "marbles"
I now have a few that have not been given names, I did have three barred rocks who ended up being called "Tylenol" "Midol" and "Motrin" because they made me six-levels of crazy!! Tylenol ended up being hit on the road. She insisted on standing in the middle of the lane and "staring" down the cars. One day someone didn't play chicken with her! Motrin was re-named Mama when she went broody and her running around being naughty days were over. Midol however did get a new name. She is still in the flock and she is now called "Mussolini". She is a horrid bi$ch to other hens, bosses the roosters and her comb grew when she took command. Overall she is 2nd in the flock behind the old Rock "Cinnamon", but her comb now folds to the side, just like the beret the special forces in the army wear. The name just stuck.
Since all of my Auracona's look so different, they stand out and so they have all been named. Lu-Lu is a lovely personable hen, Tamsin is a dumb blond, Hawkeye stars at you and gives you the willies. Bonnie and Clyde look very similar and are very anti-social. Piper and Willow are also similar, but Willow is an independent and nasty hen. Out of the blue she will run across the yard and attack my dear little Pug. Missy is another more social, but she had a nasty injury recently and so with the extra handling she has realized that 1.) we aren't so bad and 2.) if you go closer to the people you get more treats, and the final is the "Top Cock" of the flock, Cocky Rocky. He showed his attitude very early and so he earned his name.
If you plan on eating your birds I do recommend not naming them, and especially getting all the same breed, so they blend together. It does make it easier when harvest time comes.
I also have my two big boys, both are sons to my old Delaware rooster Pepper. They are Hamish and Angus. I was watching a LOT of Scottish and British "telly" at the time, and so they ended up with good Scottish names.