2 Sinister names that mean sinister for boys, listing Sinister baby names 1-2. Lonnie is a popular name. Osman is an uncommon name. View Sinister baby names for name meanings, or search other baby names.
Lonnie ... Sinister film actor Lon Chaney. 
Osman ... Henry James used this name for a sinister character Gilbert Osmond in "The Portrait of a Lady" ... 
Related tags: bad, black, crooked, dark, hard, opposed, port, side, unlucky.