[name_f]Nixie[/name_f] are Germanic river spirits/nymphs
[name_f][/name_f][name_f]Thetis[/name_f]
[name_f][/name_f][name_f]Marinell[/name_f]
[name_f][/name_f][name_f]Marisol[/name_f]
[name_f][/name_f][name_f]Nimue[/name_f] (one of the names ascribed to the lady of the lake in the Arthurian legend)
[name_f][/name_f][name_f]Nairne[/name_f]
[name_f][/name_f]Hopefully these help! 