We all had 'em (probably several) ... I won't divulge a couple of mine... no way!
My buddy who passed a couple of years ago always called me "Fred" (along with his two brothers ... Arnold (from the pig on Green Acres) and Peanut .... not their real names
)....
I don't know why .... ya get called the name once ... and it lasts a lifetime.
Fred .... from Sanford & Son .... I think it was Grady who said it...
"Fred, Fred ol' cabbage head"
Don't ask about the others
