How do Korean names work

Meteor and TenTen are brothers and meteors name is Kim tae-oh and tentens is Kim take-young so are oh and young they’re given names?

kim is their surnames, tae oh and tae young are both given names, they are both named tae because alot of parents want their kids to have similiar names ig

in east asia the last/family name goes first
family name is kim in this case, and their actual names are taeoh and taeyoung

Kim is the surname
Tae-oh is Meteor's given name
Tae-young is TenTen's given name.
(surname)(full name)

Family name usually appears first, Tae-oh and Tae-young are the given names, not just "oh" and "young".

so we just using vlr as google now

Well just look at Rbs name
Goo Sang-min
Goo is his surname/family name
Sang-min is his given name

Goo in english means "Greatest of all time or GOAT"
Sang-min in english means "of Valorant"