Karl

From the Germanic element meaning free man, shared with the root of Charles. The spelling entered American ledgers through nineteenth-century German and Scandinavian immigration, preserving its northern European consonant where the broader public default was Carl.

The name lands with a firm, single-syllable snap. It suggests someone who owns a well-maintained set of metric wrenches and reads the user manual before plugging in the appliance. Today it reads as mature and slightly austere, with an average age sitting firmly in the mid-fifties. It carries none of the decorative padding found in modern four-syllable boys names.