So after spending some time on the boards, I got interested by [Towboat421's post](https://boards.na.leagueoflegends.com/fr/c/story-art/plyBmHxT-what-are-darius-and-dravens-last-names) regarding Draven's and Darius's last names, which lead me to asking myself the following question:
How many champions have known first AND last name?
And well, here it goes, ranked by regions (if I missed some/got few wrong, let me know and I will fix it).
For clarity purpose the display will be the occidental naming patern (First name then last name).
**EDIT:** I've also added champions with a confirmed first OR last name that differs to their in-game names.
Sarah Fortune (Miss Fortune)
Tobias (Twisted Fate)
Luxanna Crownguard (Lux)
Galio Justice Justice
Jarvan Lightshield IV
Saijax Cail-Rynx Kohari Icath’un (Jax)
Cassiopeia Du Couteau
Katarina Du Couteau
Talon Du Couteau (Adopted)
Elise Kythera Zaavan
Cecil B. Heimerdinger
Ezreal Lymere (Supposedly)
Yorick Mori (No longer confirmed as canon)
Sivir Omah (Supposedly)
Janna Windforce (No longer canon)
EDIT2: I've added underneath champions with no last name but that rather refer themselves with their tribe/clan/etc.
Kong (Became Wukong after becoming Master Yi's apprentice)
Out of 141 champion, only 24 have both a first and last name that is **confirmed** as canon, 3 are no longer confirmed as canon and 6 don't have a last name but refers themselves with their tribe name.
I think this needs some work.