Names Categorized "female to male"

Ashton m & f English (Modern)
From an English surname, itself derived from a place name meaning "ash tree town" in Old English. This was a rare masculine name until the 1980s, when it gradually began becoming more common for both genders. Inspired by the female character Ashton Main from the 1985 miniseries North and South, parents in America gave it more frequently to girls than boys from 1986 to 1997. Since then it has been overwhelmingly masculine once again, perhaps due in part to the fame of the actor Ashton Kutcher (1978-).

Dominique f & m French
French feminine and masculine form of Dominic.

Donnie m English
Diminutive of Donald.

Frankie m & f English
Diminutive of Frank or Frances.

Germaine f French
French feminine form of Germain. Saint Germaine was a 16th-century peasant girl from France.

Gerry m & f English, Dutch
Diminutive of Gerald, Gerard or Geraldine.

Guadalupe f & m Spanish
From a Spanish title of the Virgin Mary, Nuestra Señora de Guadalupe, meaning "Our Lady of Guadalupe". Guadalupe is a Spanish place name, the site of a famous convent, derived from Arabic وادي (wadi) meaning "valley, river" possibly combined with Latin lupus meaning "wolf". In the 16th century Our Lady of Guadalupe supposedly appeared in a vision to a native Mexican man, and she is now regarded as a patron saint of the Americas.

Jamie m & f Scottish, English
Originally a Lowland Scots diminutive of James. Since the late 19th century it has also been used as a feminine form.

Khordad f & m Persian Mythology
Modern Persian form of Haurvatat. From the Middle Persian era, this deity was often considered masculine. The third month of the Iranian calendar is named for her.

Lennie m & f English
Diminutive of Leonard, sometimes a feminine form.

Memphis m English (Modern)
From the name of an important city of ancient Egypt, or the city in Tennessee that was named after it. It is derived from a Greek form of Egyptian mn-nfr meaning "enduring beauty".

Reyes f & m Spanish
Means "kings" in Spanish. It is taken from the title of the Virgin Mary, La Virgen de los Reyes, meaning "The Virgin of the Kings". According to legend, the Virgin Mary appeared to King Ferdinand III of Castile and told him his armies would defeat those of the Moors in Seville.

Rio 1 m & f Various
Means "river" in Spanish or Portuguese. A city in Brazil bears this name. Its full name is Rio de Janeiro, which means "river of January", so named because the first explorers came to the harbour in January and mistakenly thought it was a river mouth.

Rowan m & f Irish, English (Modern)
Anglicized form of the Irish name Ruadhán. As an English name, it can also be derived from the surname Rowan, itself derived from the Irish given name. It could also be given in reference to the rowan tree, a word of Old Norse origin (coincidentally sharing the same Indo-European root meaning "red" with the Irish name).

Santos m Spanish
Means "saints" in Spanish. It is used in reference to the Christian festival Día de Todos los Santos (All Saints' Day) celebrated on November 1.

Trinidad f & m Spanish
Means "trinity" in Spanish, referring to the Holy Trinity. An island in the West Indies bears this name.