Part nature name, part mid-century favorite, Glenda came into use in the 20th century as a feminine form of Scottish Glenn, likely inspired by Linda and Wanda too. While Glenn would give it the meaning "valley", if you do consider it a smoosh name with Linda, Wanda, or Brenda, you get means such as "beautiful valley", "tender valley", "Wend's valley", "sword valley" or "fire valley".

Irvin is an Old Man name that has an uncertain future. Losing the final g in Irving makes the name slightly less dated -- but just slightly. There's something about the 'erv' sound that makes Irvin and brothers feel unappealing.

Commonly used in Japanese families.

Efim originated as a short form of the elaborate Greek name Euphemios and is now used as a name in its own right. It can also be spelled Yefim.

Elvio is a barely-ever-used name that might just be a hidden gem. From the Latin family name Elvius, international bearers of the name include several footballers and the Paraguayan poet Elvio Romero. Parents today might see it as an alternative to more better-known Italianate names like Enzo and Elio.

The Turkish transcription of Zuleika, a zippy girl name that deserves much more attention in the US.

Finnur and Finnr are not variation of the Irish Finn or Fionn but Old Norse names referring to Finns or Laplanders, which originally means wanderer.

An unusual member of the "Lily" family of names, this one gives you the option for sweet vintage nickname Winnie, too. It's very unusual even in its native country, never given to more than 3 babies per year since naming records began in 1996.

The Sirens in Greek myth were nymphs of half-woman, half-bird appearance who lured sailors to their deaths with their song.

An elaboration of the month name, which is rare (though not unheard of) even in Wales.

Euphemios is the masculine variation of Euphemia. It was borne by an early archbishop of Constantinople.

Also spelled Bébinn, this name was borne by several characters in Irish mythology.

Derived from Welsh gwyn "white, fair" plus an intensifying prefix, Arwyn is a warm and unusual option.

French variant of Euphemia, which feels a little lighter and fresher than the English form.

A Welsh name for space fans, thanks to Tecwyn Roberts, a pioneering aerospace engineer at NASA.

Keelin is a form of Keelan, the Anglicized phonetic form of Caelan or Caoilinn, said to be a unisex name but in practice used almost exclusively for boys. Girls would more often be called Keela, Keeley, or Keely.

If you like the Irish surname feel, there are loads of more congenial options.

The Finnish translation of Elvira, a Spanish name that ultimately derives from the Gothic name Guilvira.

Unusual and romantic Italian form of Justin. Giusto has historically been more popular in Italy, but both variants are rare now.