jroberts13's list "Boy Roberts Babies" of 5 great name ideas: Dennis - Stellan!

Boy Roberts Babies

Although it has come to sound Irish, Dennis is one of the most widely-used <a href="https://nameberry.com/baby-names/162/french-names">French names</a> (St. Denis is the patron saint of France) and harks back even further to Dionysius, the Greek god of wine and debauchery. It was introduced to England by the Normans.
 Dennis was considered cool when it was near the top of the charts in the 1940s and 1950s, but has been slipping ever since, thanks in part to the devilish Dennis the Menace.
 Dennis Barlow is the main character in Evelyn Waugh's satirical 1948 novel The Loved One. Some prominent namesakes also include Dennis Hopper, Dennis Rodman, Dennis Quaid, Dennis Leary and Dennis Wilson. Denis is a secondary spelling.

Dennis

Though TV's "Frasier" made the name famous, and Frazier is a well-used variation, Fraser is the original, used mostly in Scotland. 

Fraser

Sibley

Gray-bearded name heard primarily in Sweden and Germany. 

Gustav

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.
 
While it sounds like it should be connected to stellar, it is more likely derived from the Old Norse stilling meaning "calm". Another possibility is from the Romanian Stelian and the Greek Stelios, meaning "pillar", or from the German stelle and stellen meaning "place, site" or "arrange". 
 
Nevertheless, it has a touch of celestial charm that is appealing to more and more American parents. In 2023, it was given to 121 boys (and 6 girls) — nearly double the number of Stellans born in the US a decade early.

Boy Roberts Babies

The names

Dennis

Fraser

Sibley

Gustav

Stellan