I come from the following families of Katon Basel-Landshaft, specifically the town of Rothenfluh/nearby villages:

Billinger
Eng
Erb
Erni
Fausli
Gass
Gräf
Handschi
Heffelfinger
Hummel
Märkli
Keller
Richenbach
Schaub
Schmid
Schreyber
Soland

Can anyone tell me the earliest known ancestors of these families or just the heads of families that lived about 1500? I also come from two lines of Gass, earliest ancestor I could find of each was a Michael born about 1510 & a Stephan who died about 1541.