The Van Baer family, also known as Van Baer van Lathum or Van Bahr Van Lathum, was a Middle Age noble family from Bahr and Lathum, in the Dutch province of Gelderland.
There was a Kasteel Baer (Castle Baer) in the 13th century.
References
External links heren-van-baer at graafschap-middeleeuwen.nl (Dutch) Kasteel Baer at Dutch Wikipedia (Dutch)