Gilmith
From Tolkien Gateway
Gilmith was the daughter of Imrazor a man of Númenórean descent, and Mithrellas an Silven Elf-maiden who accompanied Nimrodel before getting lost. Imrazor took her in and they married and had two children Gilmith, and Galador. Nimrellas later ran away and was never seen again. Galador would later become the first Prince of Dol Amroth.