Anime characters with the same name.

Yui and Yui

Jay

Enough said.

I'm not sure if Zero from megaman counts but there's also Zero from Vampire Knight and Zero form Code Geass

mai from my hime and mai from kanon, then there's jun from kanon and jun from rozen maiden sorry i would put a pic but i don't know how to put 2 files at the same time on my computer

From the same anime too :-) alice and alice (one is called the will of the abyss) from pandora hearts

Kaname from Vampire Knight and Kaname from Full Metal Panic.

Ooh I know! Momomiya Ichigo-chan from Tokyo Mew Mew and Kurosaki Ichigo-kun from Bleach!,though Ichigo actually means Strawberry in Japanese!:3

Karin from Kamichama Karin, Karin from Naruto, Karin from Bleach, Karin from Chibi Vampire.

Aoi Hyoudou and Aoi Hyuuga(below)

Kagura from InuYasha and Kagura Sohma from Fruits Basket

Lots of characters have the name 'Nana'! Nana Komatsu, Nana Osaki, Nana Sawada, and a few more I can't think of. The first two Nana's are from the anime Nana, and the last one is from Katekyo Hitman Reborn!

Mizunashi Akari and Akari Sakura

Yuki Nagato (TMoHS) and
Yuki Cross (Vampire Knight)

Mint from Galaxy Angel and Mint from Rio: Rainbow Gate.
^-^

Edward from Fullmetal Alchemist and Edward from Cowboy Bebop.

Madara

Madara Uchiha (Naruto Shippuden)

Madara (Natsume Yujinchou)

Haruhi

Suzumiya Haruhi and Fujioka Haruhi

Ritsu from Fruits Basket, Ritsu from OHSHC and Ritsu from K-On

Left: Aoi Oribe
Right: Aoi Yaegaki

Haruhi

Ayato Kirishima and Ayato Sakimaki
Nagisa Hazuki and Nagisa Shiota
Shiro (from No Game No Life) and Shiro (from Deadman Wonderland)
Taiga Toradora and Kagami Taiga
Lucy Heartfilia and Lucy (Elfen Lied)
Simon (Fairy Tail) and Simon (Tengen Toppa Gurrenn Lagann)

Those are all I have for now.

Erik & Erik

harruhi
haruhi

Shoyo Hinata from Haikyuu and Hyuga Hinata form Naruto

Chiya from Urara Meirochou and Chiya Ujimatsu from Gochuumon wa Usagi Desu Ka

van from gun x sword and van from vision of escaflowne
domon from g gundam and domon from flame of recca
fuu from magic knight rayearth and fuu from samurai champloo
yukina from kuromukuro and yukina from yuyu hakusho
misaki from maid sama and misaki from welcome to the nhk also misaki from angelic layer
momo from my hero academia and momo from bleach
mai from my-hime and mai from yu-gi-oh!
nanami from gundam build divers and nanami from el hazard and nanami from phantom quest corp
kagura from fairy tail and kagura from inuyasha
kaoru from tada never falls in love and kaoru from ai yori aoshi and kaoru from flame of recca
aoi from cat planet cuties and aoi from infinite ryvius and aoi from ai yori aoshi
rinko from gundam build fighters and rinko from my love story and rinko from law of ueki
lisa from ex driver lisa from girls bravo and lisa from sacred blacksmith

Denki Kaminarimon From Boruto and Denki Kaminari from My hero Academia... I mean seriously, both of their names mean Lightning Thunder. Down to their last names their names are similar.

Oh you won't believe this is the first time I have ever seen anything like this. These girls look similar, are from 2 totally different shows, and have the EXACT same name first and last.
Mari Kusakabe from Tokyo Magnitude 8.0 (Left Image)
Mari Kusakabe from Fire Force (Right Image)

Haruhi

Hinata shoyo from haikyuu and hinata hyuuga from naruto