When my sister was learning how to talk, she called me "Waka". The name had stuck until I was in high school.
When the song, Luka came out, I got called that, and people still remember me by that name, which is fine, I answer to it.
When Pokemon came out, it just so happens that my name rhymes with Pika like Pikachu, or as Ash says, Peikachu. So a niece started calling me "likachu-pikachu". That name still sticks.
Then I find out, that in Serbian, if someone says something like "Lika-Pika", it's kind of like saying the female version of "Dick Johnson". So it's funny, I laughed.