Traditionally Masculine

Sheridan is one surname-name that hasn't come into style for either gender, though it was lightly used for boys around the turn of the 20th century and girls 100 years later. The name does have an attractive sound and an appealing meaning.

Became completely feminized in the unisex name revolution of the seventies.

Deriving from the Roman cognomen Vivianus, Vivian was originally a masculine name, with Vivien being a feminine soundalike coined by Alfred Lord Tennyson for the Lady of the Lake in his famous poetic adaptation of the legend of King Arthur. It has since become a much more popular choice for girls in the US, but retains a refined British charm which sees it cropping up occasionally for boys in the Telegraph birth announcements.

Deriving from an English locational surname meaning "white island", Whitney was in rare but regular use for boys in the US until the early 1960s, when actress Whitney Blake popularized it for girls. It received a further big boost on the girls' side in the 1980s, thanks to singer Whitney Houston. Now falling rapidly down the rankings, it could be time to reclaim this one for the boys, if only as a neat way to cool-guy nickname Whit.