[Eddie.]

As a person not living in the UK, the list will be so limited.

CBB1: No one
CBB2: No one
CBB3: Brigitte Nielsen, Jackie Stallone
CBB4: Dennis Rodman, Pete Burns
CBB5: Jade Goody (just because she was on BB), Jo O'Meara, Jermaine Jackson
CBB6: Coolio, LaToya Jackson, Mutya Buena, Verne Troyer
CBB7: Ivana Trump, Sisqo, Stephen Baldwin
CBB8: Jedward, Kerry Katona, Tara Reid
CBB9: Frankie Cocozza
CBB10: The Situation
CBB11: Rylan, Spiedi
CBB12: Dustin Diamond
CBB13: Evander Holyfield
CBB14: Gary Busey, Stephanie Pratt
CBB15: Katie Price, Perez Hilton
CBB16: Daniel Baldwin, Farrah Abraham, Fatman Scoop, Janice Dickinson, Tila Tequila
CBB17: Angie Bowie, Jonathan Cheban, Tiffany Pollard
CBB18: Frankie Grande
CBB19: Ray J (besides the All Stars)
CBB20: Amelia Lily, Brandi Glanville, Sarah Harding, Trisha Paytas
CBB21: Courtney Act, Malika Haqq, Jonny Mitchell (because of LI), Shane Lynch
CBB22: Dan Osborne, Kirstie Alley, Natalie Nunn, Rodrigo Alves

I genuinely have heard of some of these people before CBB while some on here I've only heard of because their names have constantly been thrown around as speculation for a long time on prior series before they actually came on the show.

[Epic.]

CBB1: Jack, Keith, Vanessa, Chris
CBB2: Mark, Sue
CBB3: John
CBB4: Pete, Dennis, Jodie
CBB5: Dirk, Jade
CBB6: Coolio, Verne, Michelle
CBB7: Alex
CBB8: Paddy, Kerry, Jedward, Tara
CBB9: Frankie, Andrew
CBB10: Julian, Martin, The Situation, Julie
CBB11: Rylan, Ryan
CBB12: Charlotte, Lauren, Louie
CBB13: Luisa, Lionel, Evander
CBB14: Gary, George, Edele
CBB15: Katie P, Katie H, Keith
CBB16: James, Austin, Bobby, Stevi & Chloe, Janice, Farrah, Gail, Scoop (looks like this wins)
CBB17: Danniella, John, Gemma, Christopher, David
CBB18: Aubrey, Frankie, Samantha, Katie, Saira, Biggins
CBB19: Kim, James C, Jessica (only counting newbie housemates and not all-stars)
CBB20: Sarah, Shaun, Trisha, Karthik
CBB21: Shane L, Wayne, Andrew
CBB22: Hardeep, Natalie

[Jigs]

CBB4: Jodie Marsh
CBB5: Jermaine Jackson, Jade Goody, Jo O'Meara
CBB6: Coolio, La Toya Jackson, Mutya Buena, Tina Malone
CBB7: Alex Reid, Jonas Altberg, Sisqo, Stephen Baldwin, Lady Sovereign
CBB8: Paddy Doherty, Kerry Katona, Jedward, Amy Childs, Lucien Laviscount, Tara Reid
CBB9: Denise Welch, Frankie Cocozza, Nicola McLean, Natalie Cassidy, Kirk Norcross, Andrew Stone
CBB10: Coleen Nolan, Martin Kemp, The Situation, Cheryl Fergison
CBB11: Rylan Clark, Speidi, Ryan Moloney, Claire Richards, Gillian Taylforth
CBB12: Charlotte Crosby, Carol McGiffin, Mario Falcone, Vicky Entwistle, Louie Spence, Courtney Stodden, Bruce Jones, Dustin Diamond
CBB13: Dappy, Ollie Locke, Luisa Zissman, Sam Faiers, Lee Ryan
CBB14: Gary Busey, James Jordan, George Gilbey, Dee Kelly, Lauren Goodger, Ricci Guarnaccio, Stephanie Pratt, Frenchy Morgan
CBB15: Katie Price, Katie Hopkins, Calum Best, Keith Chegwin, Michelle Visage, Perez Hilton, Nadia Sawalha, Patsy Kensit
CBB16: James Hill, Bobby Davro, Stevi Richie, Chloe-Jasmine, Sherrie Hewson, Janice Dickinson, Farrah Abraham, Gail Porter, Fatman Scoop, Tila Tequila
CBB17: Scotty T, Stephanie Davis, Tiffany Pollard, Danniella Westbrook, John Partridge, Gemma Collins, Christopher Maloney, Megan McKenna, David Gest
CBB18: Stephen Bear, Ricky Norwood, Renee Graziano, Marnie Simpson, Frankie Grande, Aubrey O'Day, Katie Waissel, Chloe Khan, Saira Khan, Christopher Biggins
CBB19: Kim Woodburn, Jessica Cunningham, Stacy Francis, Chloe Ferry, Ray J
CBB20: everyone except Chad Johnson
CBB21: Courtney Act, Ann Widdecombe, Amanda Barrie, Dapper Laughs, Andrew Brady, Ginuwine
CBB22: Ryan Thomas, Kirstie Alley, Dan Osborne, Roxanne Pallett, Rodrigo Alves, Natalie Nunn

[Wojtek]

CBB11: Heidi & Spencer
CBB12: Charlotte, Courtney
CBB13: I think I heard about someone before CBB, but now I'm not even sure who it was (probably Jasmine or Lee)
CBB14: Frenchy, Stephanie, Ricci
CBB15: Chloe, Calum, Perez and both Katies
CBB16: Farrah, Tila
CBB17: Tiffany, Scotty, Megan, Gemma
CBB18: Marnie, Sam, Frankie, Bear
CBB19: Chloe, Ray J
CBB20: Jemma, Jordan
CBB21: Jess, Courtney
CBB22: Natalie

[Mitchell]

I’ve only known Faria Alam x

[JerseyWins]

Main ones I knew pretty well before watching: Heidi & Spencer, Frankie Grande cause of BBUS, Gary Busey, Perez Hilton, Tila Tequila, The Situation would be one of the most familiar with going into it if I watched his season

There's a couple others I just recognized randomly (for example Tiffany Pollard, Angie Bowie kinda, Stacy Francis & Ray J, etc.) but I still had little to no knowledge of them. Like I knew what Ray J's dick looked like but that's about it.

[MB.]

I once dog sat for Prince Lorenzo

[Matthew.]

Originally Posted by JerseyWins

Main ones I knew pretty well before watching: Heidi & Spencer, Frankie Grande cause of BBUS, Gary Busey, Perez Hilton, Tila Tequila, The Situation would be one of the most familiar with going into it if I watched his season

There's a couple others I just recognized randomly (for example Tiffany Pollard, Angie Bowie kinda, Stacy Francis & Ray J, etc.) but I still had little to no knowledge of them. Like I knew what Ray J's dick looked like but that's about it.