Alana, in all its various spellings, was at one time reserved for daughters of dads named Alan, but is now much more widespread. It came into prominence via model/actress/celeb spouse Alana Hamilton Stewart.

In its three most popular spellings -- Alan along with Allen and Allan -- this midcentury favorite has tended to skew older. It was a Top 100 name from 1938 to 1971, peaking at Number 40 in 1951. Alan has had leading roles on recent TV, in shows like Two and a Half Men, 24 and Boston Legal.

Aiden in all its spelling variations is the Anglicized version of the Irish Aodhán, which was originally a pet form of the Irish name Aodh (pronounced 'ee'), who was the old Celtic god of the sun and fire. St. Aidan was a famous seventh century Irish saint, noted for his kindness and generosity and for spreading Christianity.

Aidan in all its many splendored varieties, particularly Aiden, had a spectacular rise up the list, and the phonetic Ayden came along for the ride. It is also used in Turkey.

Aidan was originally a pet form of the Irish name Aodh (pronounced 'ee'), the name of the old Celtic god of the sun and fire. The name was borne by numerous early Irish saints, one of whom was noted for his kindness and generosity.

Aisling is currently a very popular Irish name for girls. Pronounced variously as ASH-ling, ASH-lin or ash-LEEN, it was part of the revival of authentic Irish names in the twentieth century, and is now being sparingly used by U.S. parents in place of the dated Ashley--though often spelled phonetically as Ashlyn or Ashlynn.

This extra-L variation of Alan isn't quite as popular in the US as the original. Both spellings remain popular in Ireland and England.

While the male Alva or Alvah relates directly to the minor Biblical character, the female version is more likely an Anglicized form of the Irish name Ailbhe, or a feminine form the name Alf (and Alf- beginning names), popular in its native Sweden and Norway. Best known as Thomas Edison's middle name, Alva has true unisex roots.

Arlen is a surname long used as a first name: It ranked on the US Top 1000 from the late 1920s until the late 1960s. Originally, Arlen was a variation of Harlan which came from Harland, a place-name which means "hare land" – a place with lots of rabbits.

Ailbhe is a unisex Irish name that has appeared throughout Irish history, borne by a 6th-century (male) saint, and by a female warrior of Fianna, a legendary group of women warriors, led by Fionn MacCumhaill. Today, the name is predominantly used for girls, likely because it sounds similar to Alma, Ava, and Alba.

Alaina, part Alana and part Elena and maybe also a little bit Elaine, is one of the many feminine forms of Alan (or its French form Alain) that have grown in popularity over recent decades, surpassing the male original. Not quite fashionable but also not quite un, Alaina is a choice that may feel more distinctive than it really is.

More commonly seen here as Anya, this traditional yet unique Irish name belonged to the queen of the Munster fairies and is sprinkled throughout Irish folklore as an early Celtic goddess of summer and prosperity. One of the most popular baby names in Ireland, Aine's spelling and pronunciation might seem simple but could prove confusing in the U.S.

Irish Aileen and Scottish Eileen may be pronounced the same way or Aileen can be pronounced with a long a at the beginning. While neither is particularly stylish, Aileen is slightly more popular and has reversed its downward slide to inch upward in the past few years, perhaps thanks to its stylish A beginning. Nicknames for Aileen include Isla, Ayla, Lee and Lena.

This soundalike for the famous volcano, Mount Etna, is a fiery Irish choice that could be perfect for a red-haired baby girl.

Aoibhe may be considered a form of either Aoife -- beauty in Irish -- or Eve, which means life. Either way, this popular Irish name for girls is pronounced as Eva though outside of Ireland few would guess that. Leave Aoibhe to the Gaelic speakers.

In Egyptian mythology, Amon is a major god associated with creation and the air. He was later fused with the Sun god, Ra, and became Amun-Ra.

An ancient Aoibheann was the mother of Saint Enda, and Aoibheann remains popular in Ireland today, sometimes with its Anglicized spelling Eavan.

Old Irish name that's taken off in its Anglicized forms, mainly Ashlyn or Ashlynn. Nonetheless, this more traditional version debuted in the US Top 1000 in 2015.

Aoibhinn and its twin name Aoibheann may be popular in Ireland but most English-speakers would find the spelling baffling and the pronunciation impossible to divine. It's ee-van, or se-vin, fitting with the Irish popularity of many names -- Aoife, Eabha, Ava -- with this similar sound.

Also spelled Aulay in Scotland, this is an attractive form of the Scandinavian name Olaf that blends several currently fashionable sounds.