I found these two names that might suit your Scorpid.
ARLYN/
ARLEN: Cornish name composed of the elements ar "war" and lyn "pool, water," hence "water battle."
CALDER: English surname transferred to forename use, probably from the place name Calder in Cumbria, composed of the Welsh elements caled "hard; violent," and dwfr "stream, water," hence "violent water."
I quite like Calder myself. Violent water seems a very suitable description for a blue scorpion.
