I actually had a similar problem to this before I joined imgflip
One of my IRL friends had a TON of sisters. I forget how many but I wanna say it was close to 10
The only one I could remember was named Ohana, she was adopted and all of the girls in my friend's family had names that started with O, so she wanted an O name too.
She chose Ohana because it means family
(Not sure if I spelled it right though)