Sinnie

Sinnie is an uncommon feminine name with several possible origins. It may function as a diminutive form of names containing "Sin" like Cynthia or Sinead, or potentially derive from regional nicknames or surname adaptations. The name has a sweet, endearing quality with its diminutive -ie ending, giving it a somewhat vintage feel reminiscent of early 20th century nicknames. Extremely rare in formal usage, Sinnie might have appeared more frequently as a familiar family nickname than as an official given name. Its brevity and simple pronunciation make it accessible, though its uncommon nature might require occasional explanation. The name carries a quaint charm that balances uniqueness with a friendly, approachable quality.

Pronounced SIN-ee.

As of October 2026, Sinnie ranked #4205 in US births in 1937 SSA, peaked at #1260 in 1886.