Possibly from French 'de la mar' meaning 'of the sea,' or a modern coined name.
Demar is a name with a rich African American creative tradition, constructed with the French prefix de- ("of" or "from") fused with Mar, itself a root touching both Latin mare ("sea") and the widespread European personal name Marc/Mars. This structure places Demar within a broader naming practice prominent in Black American culture from the mid-twentieth century onward — the artful construction of new names that honor ancestral creativity while asserting a distinct cultural identity outside European naming conventions.
The name gained its highest public profile through DeMar DeRozan, the NBA All-Star from Compton, California, whose career with the Toronto Raptors, San Antonio Spurs, and Chicago Bulls has been defined as much by his emotional openness about mental health as by his silky midrange artistry. DeRozan's willingness to speak publicly about depression broke significant ground in professional sports culture, and his name has consequently accumulated associations with authenticity, resilience, and unexpected vulnerability. As a given name, Demar carries a rhythmic confidence — the stress pattern (de-MAR) lands with quiet authority.
It belongs to a family of constructed names, alongside DeShawn, DeMarcus, and DeAndre, that have deep community resonance while remaining less common than their component parts. Bearers of the name often report that its relative rarity feels like a gift: distinctive without being bewildering, rooted in a living tradition of naming as an act of self-definition.