The same power surge, that both seemed to share with Kenny, was proof enough for them that they are relatives, albeit distant ones. Mikasa inherited her name from her father, while Levi inherited his name from his mother’s side, as his biological father was never revealed. Kenny Ackerman was revealed to be Levi’s uncle.
You may be thinking “Why do levi and mikasa have the same surname?”
In the case of Mikasa and Levi, they share the surname Ackerman. While there’s no way they are siblings— they have different parents, after all— there’s evidence that the two of them are distant cousins, especially when considering the power they share with Kenny.
Are Mikasa and Levi related to each other?
In the real world, most strangers with the same last name are rarely related to each other, but in the world of Attack on Titan, it’s eyebrow-raising to see two main characters with the same surname. In the case of Mikasa and Levi, they share the surname Ackerman.
Another common inquiry is “What made the Levi/Mikasa ship so interesting?”.
The fact that everybody except Mikasa was intimidated by Levi sensei, also made this ship very interesting. Eren and Jean were too childish for Mikasa and also Levi and Mikasa’s relationship started with hatred (for Mikasa’s side) and indifference (on Levi’s side) but evolved into mutual respect and succesful teamwork.
Why do Mikasa and Kenny have the same last name?
Mikasa and Kenny having the same last name is not a coincidence. Mikasa, Levi, and Kenny are descendants of the Ackerman clan. Later in the season, Levi finds out he is also an Ackerman. Because of their clan’s enhanced strength, they were special guards for the royal family.
Are Kenny and Levi Ackerman related to Mikasa’s father?
Ackerman is Mikasa’s last name, her mother is the Oriental aka Asian her father is not, so if Kenny and Levi’s last name is Ackerman the they have to be related to Mikasa’s father. Kenny and Levi are not Asian.