Here's the story.
An Italian family named their son Friday. The parents registered him as Friday, and he was baptized as Friday. However, a clerk brought the name to the attention of a tribunal. So now the kid's legal name is Gregory, because he was born on that saint's feast day. The officials changed it to protect him from teasing later on and because Friday is a bad luck day in Italy.
I only checked this out because of the Thursday Next series by Jasper Fforde.
The main character is Thursday.
Her mom is Wednesday.
Thursday's son is Friday and her daughter is Tuesday.
I think those are nice, interesting names.
However, since the family is Italian, you'd think they'd name their kid "Venerdì".
Friday's an English word with Norse roots, I believe.
One more note - I'd love to have a boy dog named Loki and a girl dog named Thursday. Hopefully they won't fight too much.