Girls
Amaya (a-MYE-uh ... "rain" meaning, so this is maybe pushing the water theme a little, but still)
MarinaMarisMarissaMeriel /
MurielMerlynMichal (pronounced like "
Michael")
Rhea
Boys
ChanningConwayMerlin /
Merlyn
Either
Aeron (pronounced EYE-run ... the name of a river in Wales as well as a Welsh name)
LakeMorgan (If you want to be technical,
Morgan as a female name probably has a different origin, but as a male name it's water-related in meaning)
OceanRain