Once popular baby names now on the verge of extinction

Looking for a unique name for your little bundle of joy? These names are sure to stand out with rare distinction as a baby naming website says they're "on the verge of extinction."

According to Nameberry, once popular names given to baby boys and girls are being chosen less and less each year. Using data pulled from the Social Security Administration, these 15 names were given to only five babies each in 2013, the lowest number they counted.

Girl's Names:

Alpha - Do you know a little girl named Alpha? Neither do we. Alpha ranked No. 301 on the list back in 1880, the first year baby name records were kept in the United States.

Barbra - Although Barbra Streisand made her creatively condensed take on Barbara famous in the 1960s, Barbra dropped off the Top 1000 in 1971 and is poised to disappear for good. (The conventional spelling Barbara remains on the list.)

Claudine - A feminization of ancient Roman name Claudius rose to its peak in 1970 with the popularity of singer Claudine Longet, but fell off a few years later after she was convicted of negligent homicide of her husband.

Nanette - The name hit peak popularity back in 1956, according to Nameberry, but it's a no-no now.

Sheba - Short of Biblical Bathsheba, having only five recipients of the name fared far luckier than the original Bathsheba, which is considered completely extinct in the U.S.

Sondra - Though popular during most of the 20th century, the name was devastated by the notorious Hurricane Sandy in 2012, plunging the number of baby girls named Sandra and Sondra the following year.

Thisbe - While never scoring in the top 1,000 names in the past two centuries, the name of the young lover who inspired the tale of Romeo and Juliet is almost forgotten.

Zelma - All names ending with "elma" seem to be drop in popularity since the 1950s, but Zelma is nearly extinct.

Boy's Names:

Elmo - The short form for Guglielmo, the Italian version of William, the hope for this name's survival was dashed considerably by the ticklish star of Sesame Street.

Icarus - Famous as the boy who flew too close to the sun, the name was doomed when parents caught on to the "icky" sounding first syllable.

Inigo - The Spanish version of Ignatius, the name received new attention when it was given to actress Cate Blanchett's son, but nobody seemed to follow her lead.

Llewellyn - A common name in Wales, but not so common in the U.S. anymore.

Remus - The less famous brother of Romulus, the legendary founder of Rome, the name did not fare well after the controversial "Uncle Remus" character was popularized in the late 19th century.

Sherwood - Probably most famous for being the forrest home of Robin Hood and his merry men, and distinguished by influential novelist Sherwood Anderson, the name was popular for the early half of the 20th century. Now, not so much.

Waldo - Where's Waldo?! You'll be hard pressed to find him anymore. Popular from the 1880s to the early 1940s, the name was doomed when it became a victim of anti-German sentiment during WWII. It wasn't until 1987, with the publication of the "Where's Waldo" books, did the name receive positive attention in the U.S. again, but not enough to revive it.