You say this >>list of the CAPT. JACOB DuBOIS' COMPANY, 2d BATTALION (Revolutionary War) is from an Ancestry.com database.<<
If you were to say exactly what 'database' (published book? author/publication data? microfilm image? what microfilm? what frame or image number?) and the identifying data that accompanied it (State and poerhaps County), together with the date of the document, it would be possible to get a better idea of where the unit was recruited.