Stellan is a strong, attractive, Scandinavian possible up-and-comer, known through actor Stellan Skarsgard, and his namesake, the son of Jennifer Connelly and Paul Bettany. Its trendy 'an' ending and the similarity in sound to the popular Kellen/Kellan make it all the more accessible.

The final n makes this choice infinitely more modern than Gail.

Traditionally spelled as Nālani, this name is evocative of tranquil island escapes. Combining the popular Hawaiian element lani ("sky, heaven, chief") with nā ("the (plural)" or "quiet, calm"), it debuted in the US Top 1000 in 2016.

Galena is the feminine of the Galen, which means calm. Galena is also a mineral-related name, a type of lead.

Galene is a minor goddess of Greek mythology, representing the calm seas. She is also sometimes referred to as Galatea.

Tylah or more correctly Tyla may be used in the US as a variation of Tyler but is an authentic Lithuanian name in its own right.

Mandara is one of those names that sounds like its meaning -- and calm is certainly a quality worth courting in a child.

Protagonist of the manga and anime series Demon Slayer: Kimetsu no Yaiba. The kanji used to spell his name give it the meaning of "coal + calm son," which describe his former profession as a coal worker.

Derived from an ancient Roman name, this is best known in its male form Placido, thanks to the tenor.

Appealingly peaceful and placid.

Everyone will misunderstand it as Lara, but if you're willing to put up with the confusion, this is a truly different yet simple option.