mizutenshi
Gama
You don't translate names, so Brett is still Brett in japanese.
'Mizu no oujo'.
流水 Ryūsui
"Unagi" is a water serpent, or eel
You may say 'mizu ga suki desu.'
Well, "Bob" is an English name, and therefore, has no Japanese equivilant. You could spell it out in Japanese symbols, but the word would still be "Bob"
Another time waster.
aqua is mizu-iro(=color); water
water = Mizu, Moon = Tsugi, Wolf = Ookami
Note* there is not exact was but saying "Sinku" as a English-Japanese term Rather say "in water" 水中で (suichu de)