The name is derived from the name Bartoš (hypocoristic form of the Slovak or Czech given name Bartolomej ‘Bartholomew’). It may also be derived from the medieval Hungarian name Bartos (hypocoristic form of the Hungarian equivalent of the same given name; spelling adaptation). In both cases, it refers to the connection with the father or another ancestor by that name. VariantsVariants: Bartos, Bártoš.