As most of you know, I have only been around the ZD forums for 6 months at the most, so my story doesn't go too terribly far back like most of yours do.
On Miiverse, I went through a lot of name changes, until I settled on Ghirahim because he's cool. Once Breath of The Wild came about, I learned of the YIGA clan, and thought it fun to "Switch" things up and replace "Ghira" with "YIGA" to make YIGAhim (Pronounced: Yee guh him) instead of Ghirahim (Pronounced: Gear uh him).
I suppose it stuck, and that's that