Agatha Christie's Poirot

Ruth, with its air of calm and compassion, was the third most popular name in the 1890s, remaining in the Top 10 through the 1920s. It's still in use today as some parents tiring of Rachel and Rebecca are giving Ruth a second thought. Some see such Old Testament girls’ names as Ruth and Esther rising on the heels of boy equivalents Abel and Moses.

Sally is a cheerful, fresh-faced girl-next-door name that was originally a nickname for Sarah, but has long been used independently. Sally was popular in the eighteenth century and then again from the 1920s to the 1960s--it was just outside the Top 50 around 1940. Though it hasn't been heard as a baby name for decades, we can see Sally bouncing back, especially after her exposure as young Ms. Draper on Mad Men--the Nameberries rank it at Number 621, and it's a Top 100 name in Sweden.

A soft and interesting Hebrew name long popular in France, where it has ranked in the Top 400 since 1986 (as Salomé). Ex-ER star Alex Kingston named her daughter Salome Violetta.

Samuel has been so popular for so long that it's hard to believe it's still climbing, at its highest point since the 1890s.

Sarah was derived from the Hebrew word sarah, meaning "princess." Sarah is an Old Testament name—she was the wife of Abraham and mother of Isaac. According to the Book of Genesis, Sarah was originally called Sarai, but had her name changed by God to the more auspicious Sarah when she was ninety years old.

Sheila peaked in popularity from the 1930s to the 1960s (she reached Number 49 in 1965), along with Maureen and Colleen; parents today would probably go back to the original Cecilia or forward to Shea.

Could Simeon be the next Gideon? Parents seeking a less simple form of Simon might consider this biblical appellation that was chosen by Wynton Marsalis for his son. Simon is actually the Greek substitute for Simeon.

Simon is pure and simple (not in the nursery rhyme sense), and an appealingly genuine Old and New Testament name that's not overused. These factors make Simon a stylish yet classic choice.

Early European import, well known in the 1940s via Norwegian skating movie star Sonja Henie, that has sailed back across the Atlantic, despite the rising popularity of other Russian names.

A name that conjures up billionaire shipping magnates like, for instance, Stavros Niarcos.

Stephen, also spelled Steven, is a strong and likable classic, with the he's-a-great-guy short form Steve. Though not as well-used or fashionable as it was in its heyday -- it was a Top 25 name from 1946 to 1957 -- it's still a widely used name. It remains an even more popular in Ireland.

Although Susan had her heyday from the thirties to the sixties, and is now common among moms and new grandmas, and though most modern parents would prefer Susanna/Susannah, we have spotted some flickers of interest in a revival. It still retains a certain black-eyed-Susan freshness.

The Sydney spelling most popular for girls: it's in the Top 50 on the female side. Cool for a girl, still nerdy for a guy.

Like Ed, Eddie and Teddy, Ted is rarely used as an independent name – in the US, at least. In the UK, Eddie ranks just outside the Top 200, Teddy ranks just outside the Top 30, and Ted is a Top 200 pick.

With Theodore rising, Ted may have new life among parents who don't want to use the short form Theo. And TV's Ted Lasso makes it a quintessential nice guy name.

A name that seems to hail from the old Irish neighborhoods of Boston and New York, Terence actually dates back a lot further, to the time of a famous second-century poet, who started life as a North African enslaved man in the house of a Roman senator and it was also borne by several early saints.

Though modern parents seeking to honor an ancestor named Thelma might opt for the airier Thea instead, Thelma is starting to make its way back onto adventurous vintage name lovers' radars. It is currently experiencing a modest revival in France, where it now ranks around the #300 mark.

The popular appeal of the strong, intelligent Saint Teresa of Avila, combined with the selfless compassion of the more recent Mother Teresa, have fused to give this second-tier classic a somewhat noble, religious image. Although the origins of the name are uncertain, it has been prevalent particularly in forms Theresa, Teresa, and Therese throughout Europe for centuries.

Thora, related to Thor, is the ancient Norse thunder goddess name that's much softer and gentler than its meaning suggests. A noted bearer is actress Thora Birch.