Sinclair Lewis's birth name is Lewis, Harry Sinclair.
Red Sinclair's birth name is Reid Sinclair.
Johnny Sinclair's birth name is Johnny SInclair Serafini.
Lister Sinclair's birth name is Lister S. Sinclair.
Sinclair Hill's birth name is Hill, Gerard Sinclair.
Mathew Sinclair's birth name is Mathew Stuart Sinclair.
Elliott Sinclair's birth name is Elliott Sinclair Calvert.
Harry Sinclair Drago's birth name is Harry Sinclair Drago.
Olivia Sinclair's birth name is Susan Wilson.
Buffy Sinclair's birth name is Michelle Watson.
Annette Sinclair's birth name is Annette Maria Szymanski.
Christina Sinclair's birth name is Christina Michelle Schuller.
Graham Sinclair's birth name is Graham E Smith.