Pastos/Andartes Family from Milopotamos

My name is Susan Dritsas and I am trying to verify the family history of my mother-in-law, Barbara Dritsas, nee Andartes. The family orignally came from Milopotamos and the family name was Pastos. Her paternal grandfather Ioannis Pastos allegedly earned the nickname 'andartes' while fighting in Crete circa 1860, and part of the family subsequently changed their name from Pastos to Andartes. Would love to hear from anyone who has any info on the Pastos family.