Fíriel

Fíriel was a High-elven name used by the Dúnedain, most famously as the name of Gondorian princess who wedded Arvedui of Arthedain. At some point, the name was woven into a popular rhyme, The Last Ship¹ which became known in the Shire. From that source, it was chosen by Sam Gamgee's daughter Elanor and her husband Fastred for one of their daughters.

Fíriel's surname is uncertain. Following Hobbit tradition, she would have taken the name of her father, so she would probably have been known as 'Fíriel of Greenholm' (or just 'Fíriel Greenholm'). However, her brother Elfstan founded the Fairbairn clan, so it's conceivable that, as a member of the same family, Fíriel acquired the name 'Fíriel Fairbairn'.