So far only pearly gets a prize.
Marilyn Manson is indeed the band's name and the artist's name. Kind of unsurprising considering he/they updated Alice Cooper's shock rock for the nineties. Or should that have been Alice Coopers'?
I thought boomer might be on a winner with Captain Beefheart, but that was only ever Don Van Liet's pseudonym, his band was the Magic Band
Bon Jovi was only ever the band, John Francis Bongiovi, Jr used the moniker Jon Bon Jovi in his solo efforts.
Blondie got their name from Deborah Harry's platinumness, but she never recorded solo using that name.
Jethro Tull, sadly, never built on his fame in agricultural engineering to branch Minogue-like into recording And missed a golden opportunity to join a band that had his name, by dying quite few years before any of the members were born.
Eminen was only ever Marshall Mathers' pseudonym.
Perhaps strangely, for all the members of The Ramones (e.g. Joey, Dee Dee, etc) none of them had the foresight to name himself 'The'.
Alex and Eddie Van Halen always included their first names when not recording as a band.
And while its outside my purview I'm pretty sure castration refers to the removal of the testicles https://en.m.wikipedia.org/wiki/Castration
It might be the iPad screen but it looks like Jethro has been experimenting with penectomy. Parental advisory warning https://en.m.wikipedia.org/wiki/Penectomy