Three Syllable Girl Names

An elf maiden in Tolkien's legendarium who was lost at sea, and became the subject of the Song of Nimrodel, sung by Legolas by the river of the same name.

Variant of Marina

Sounding like a cross between Nancy and Natalie, Nantale might have potential as same-but-different African-to-American crossover.

Leucosia was one of the Sirens of Greek Mythology. The island across from the Sirens' island was named after her.

Ritona, also known as Pritona, is a Celtic mother goddess.

A globetrotting placename — Diani Beach is a popular tourist destination on the Indian Ocean in Kenya. It's similar enough to Dion and Diana to feel namelike, although it is actually very rare in the US.

From Alverta — a form of Alberta — this is possibly the most attractive feminization of Albert.