Thank you Strawberry!
Kohaku is named after a character from Spirited Away that is very close to my heart.
Spoiler
In the movie, the main character is a wimpy whinebag that' that's upset about moving away from her old home and all of her old friends to attend a new school in a different city. Throughout her adventures with Haku she finds her inner strength and confidence. By the end of the movie, (as in the last line), her parents mention how scary starting life in a new advil can be, and she replies with "I can handle it". Obviously I am leaving out an entire two hours of action and fantasy, it's an amazing movie and I couldn't recommended it highly enough, but I got Haku as my graduation present from high school, and I was pretty nervous about starting college, so I thought maybe he's be my good luck charm, just like he was to Chehiro. ^^; Sappy, I know, but hey, I'm hella corny.
Simba was named not after the character from Lion King, but after the stuffed animal of said character I got at the Disney store when I was little. ^^; Did I mention that I got hey in first or second grade?
And Starry Night was named by my mother after her favorite painting. My mum bought hey for me so that I would stop bringing slugs into the house as pets. ^^;