I believe I have found a good portion of Lewis' family up to the 1920's. My research shows that Lewis and his wife Sarah (Harter) had 4 children but only 3 survived into the 1900's. Of those, I was only able to find 2 sons; Robert W. and Charles F.
It appears Charles F. Mensch was raised by his uncle Thomas Harter and wife Mary Izora (Musser). There was one child born to Thomas and Mary Harter who died at an early age. Charles F. married Bessie (Musser), his aunt Mary Izora's sister. They had two sons; Thomas H. and Charles A.
Robert W. Mensch married Annie N. (surname unknown) and they had two children; LeRoy W. and Florence Loretta.
Researcher cmensch08: Could you please verify, correct and/or add to this narative. Thank you.