"Sumahi" Sounds Japanese

I hear times and times again that people say "Sumahi" sounds like a Japanese name. So I went to look for a combination of words that "Sumahi" might means. I first tried "Su" and "Mahi" as different charactor, but there were no character for just "Su" and "Mahi" means to numb. Then I tried "Suma" and "Hi" and what I come up is this:


須磨 (Suma) a Japanese family name
緋 (Hi) scarlet, crimson

And the individual character for 須磨 means this:

須 (Su) Neccessary
磨 (Ma) Polish, grind