I know of a child called
Olivia Twenty Dahl (1955-1962) who got her first name after the character in Twelfth Night and her middle name from the fact that her father only had $20 in his pocket when he first saw her in the hospital. An author
Jung Chang says that her great grandmother was simply known as daughter number two and never had a name.
If Four is this little boy’s name though and not his age it is going to cause a lot of confusion when people first meet him though they will get used to it. I really don’t like it though.
Don’t take criticism from someone you wouldn’t take advice from