Note: Okay since some people are curious these are their working names (I call them that in case I change my mind, for example was gonna call Piper "Pip" originally which is nickname for Philip which is my dad's name so I wasn't keen on using it so then after I started to write it I found Pan and liked that much better) so here are their names:
The Charmed Ones:
Prue - Payton "Payt" Halliwell
Piper - Panos "Pan" Halliwell
Phoebe - Phoenix Halliwell
Paige - Paden Matthews
Others:
Jeremy - Jerri Burns
Roger - Rebecca
Andy - Angela "Angie" Trudeau
Leo - Leanora "Lee" (or maybe "Leah") Wyatt
Dan - Danielle "Dana" Gordon
Jenny - Jake Gordon
Jack - Julie Sheridan
Cole - Cora Turner
Glen (I forget his last name) - Gwen
There's the names I've changed already, their more important love interests of the first 4 seasons (haven't decided what to do about Wyatt, Chris and the other children yet so that's why I stopped there for now on my name altering). The ones that appear for only one episode I've just ignored and will change as I come to them unless I've forgotten anyone who I will change as I need to. Am open to suggestions.
UPDATE: Added Roger/Rebecca, thank you Guest for point that out!