Maybe because it sounds like a element on the periodic table? To me - at least.
I could definitely see
Tenzin being popular in this day in age, it has a cool meaning, a nice sound, and it’s not so horrible overall.
I would maybe use
Tenzin Caleb or
Tenzin Oliver.
https://www.behindthename.com/pnl/217493
"It is not in the stars to hold our destiny but in ourselves." - William Shakespeare
