Fact from each member of a superhero team

As in the likes of DC's Titans and Marvel's X-Men in terms of their original and most successful periods (1964-96 for the former and 1963-91 for the latter).

Both teams

1. Teen Titans - They were nameless in their first appearance.
2. X-Men - They almost went by the Mutants.

Teen Titans 1964-1969

1. Dick Grayson / Robin / Nightwing / Batman - 
2. Wally West / Kid Flash / Flash - 
3. Garth / Aqualad / Tempest - 
4. Donna Troy / Wonder Girl / Troia / Darkstar - 
5. Roy Harper / Speedy / Arsenal / Red Arrow - 
6. Lilith Clay / Lilith / Omen - 
7. Hank Hall / Hawk - 
8. Don Hall / Dove - 

X-Men 1963-1969

1. Charles Xavier / Professor X / X - 
2. Scott Summers / Cyclops / Phoenix - 
3. Bobby Drake / Iceman - 
4. Hank McCoy / Beast - 
5. Warren Worthington III / Angel / Archangel - 
6. Jean Grey / Marvel Girl / Phoenix / Dark Phoenix - 
7. Calvin Rankin / Mimic - 
8. Kevin Sidney / Changeling / Morph - 
9. Lorna Dane / Polaris - 
10. Alex Summers / Havok - 

Teen Titans 1970-1979

1. Malcolm Duncan / Guardian / Hornblower / Herald / Vox - 
2. Tula Marius / Aquagirl - 
3. John Gnarrk / Caveboy / Gnarrk - 
4. Duela Dent / Joker's Daughter / Harlequin / Riddler's Daughter - 
5. Karen Beecher / Bumblebee - 
6. Bette Kane / Bat-Girl / Flamebird / Hawkfire - 
7. Charley Parker / Ch'al Andar / Golden Eagle - 
8. Garfield Logan / Beast Boy / Changeling - 

X-Men 1970-1979

1. Kurt Wagner / Nightcrawler / Spinnenmann - 
2. James Howlett / Logan / Wolverine - 
3. Sean Cassidy / Banshee - 
4. Ororo Munroe / Storm - 
5. Shiro Yoshida / Sunfire - 
6. Piotr Rasputin / Peter Nicholas / Colossus / Juggernaut - 
7. John Proudstar / Thunderbird - 
8. Phoenix Force - 

Teen Titans 1980-1989

1. Raven Roth / Raven - 
2. Koriand'r / Kory Anders / Starfire - 
3. Victor Stone / Cyborg / Technis / Cyberion - 
4. Jason Hart / Protector - 
5. Tara Markov / Terra - 
6. Joey Wilson / Jericho - 
7. Azrael - 
8. Kole Weathers / Kole - 
9. Jason Todd / Robin / Red Hood - 
10. Danny Chase / Phantasm - 
11. Frances Kane / Magenta - 
12. Chris King - 

X-Men 1980-1989

1. Kitty Pryde / Sprite / Ariel / Shadowcat / Star-Lady / Star-Lord / Captain Kate / Red Queen / Shadowkat - 
2. Carol Danvers / Ms. Marvel / Binary / Warbird / Captain Marvel - 
3. Lockheed - 
4. Anna Marie / Rogue - 
5. Rachel Summers / Phoenix / Marvel Girl / Prestige / Askani - 
6. Max Eisenhardt / Erik Lehnsherr / Michael Xavier / Magneto - 
7. Longshot - 
8. Sam Guthrie / Cannonball - 
9. Dani Moonstar / Psyche / Mirage / Valkyrie / Moonstar - 
10. Xuan Cao Manh / Karma - 
11. Amara Aquilla / Alison Crestmere / Magma - 
12. Roberto da Costa / Sunspot / Citizen V - 
13. Illyana Rasputina / Magik - 
14. Doug Ramsey / Cypher / Revelation - 
15. Warlock / Douglock - 
16. Rahne Sinclair / Wolfsbane - 
17. Betsy Braddock / Psylocke / Captain Britain - 
18. Alison Blaire / Dazzler - 
19. Moira MacTaggert / Moira X - 
20. Jimaine Szardos / Amanda Sefton / Magik - 
21. Mark Hallett / Sunder - 
22. David Haller / Legion - 
23. Sharon Friedlander - 
24. Tom Corsi - 
25. Alysande Stuart - 
26. Daniel Lone Eagle / Forge - 

Teen Titans 1990-1996

1. Dawn Granger / Dove - 
2. Rosabelle Mendez / X-24 / Pantha - 
3. Leonid Kovar / Starfire / Red Star - 
4. Miriam Delgado / Mirage - 
5. Tara Markov (Stratan doppelganger) / Terra - 
6. Carrie Levine / Redwing - 
7. David / Dagon / Nightrider - 
8. Charlie Watkins / Killowat - 
9. Jon Levine / Prestor Jon - 
10. Dick Grayson (Team Titans) / Nightwing / Deathwing - 
11. Merged souls of Danny Chase and Angela Roth / Phantasm - 
12. Baby Wildebeest - 
13. Alexander Lyons / Battalion - 
14. Wonder Boy - 
15. Bart Allen / Impulse / Kid Flash - 
16. Grant Emerson / Damage - 
17. Kyle Rayner / Green Lantern / Ion - 
18. Matrix / Linda Danvers / Supergirl - 
19. Rose Wilson / Ravager - 
20. Jarras Minion / Minion - 

X-Men 1990-1991

1. Remy LeBeau / Gambit - 
2. Jubilation Lee / Jubilee - 
3. Jamie Madrox / Multiple Man - 
4. Theresa Cassidy / Siryn / Banshee -