Charly is a third spelling variant of Charlie — alongside the traditional Charlie and the social media-era Charli — and its male-skewing registry data suggests it's used primarily in households where a personal or family spelling preference drives the choice. At rank 995, it's a registry artifact of naming affection rather than a trend name.
The Spelling Variant Ecosystem
Charlie, Charli, Charly — all three show up in this rank cluster within a few positions of each other, which is a minor registry curiosity. Charly is the least common of the three spellings in English-language contexts, and it's more common in French and some European naming traditions where this variant is standard.
Possible French or European Connection
Charly as a spelling is more visible in French-speaking contexts and parts of Latin America, which may explain some of the registrations in cities with diverse populations. A French-speaking family registering their dog under the French spelling of a name they love is not unusual and is its own form of authenticity.
Practical Reality
For anyone who doesn't have a specific reason for this spelling, Charlie is the most searchable and recognizable variant. Charly is completely valid but will require spelling out more often. Browse the full pet names directory for comparison. Human baby name context lives at our Charlie page.