I did find an Ada Hendershot born roughly 1920 don't know exact bith date. She would be the younger sister of my grandmother Susie Hendershot.
I found them located together in a 1930 census from Armstrong County, Valley, PA. Listed is Elizabeth Hendershot head of house hold. Verda M, Susie, and Ada.
I recenlt was contaced by a woman who responded to a posting I had about the Hendershot name. She was affiliated with a cemetery and was trying to find out how people were related in the Simpson Methodist Cemetery in Kittanning Twp., PA. both Susie and Elizabeth are buried there.
She also informed me that Elizabeth Hendershot's maiden name was listed as Webb. Of course I ran with this and researched like mad because that last name was what I needed. I found a 1920 cencus from Grant County, Ritchie, West Virginia listing Elizabeth A. Webb married an Otis Pierce Hendershot ( funny cause my dads middle name is Otis ) and had the following daughters ( no boys ) Letha, Sadie ( funny again because my Aunt is named Sadie ) Hazel, Ethel, and Susie. I have a theory as to why Ada was not listed. If Ada was born in 1920 Elizabeth may have been pregnant with Ada at the time the census was taken. I do not know why they whent to PA though. I don't show the other girls listed they very well could have married and stayed in WV. The research goes on.
I am not posotive that this is the Ada you speak of but I will do more research and keep you in mind when I get with an Aunt to help me verify my information. Now that I have a possible husbands name this will help me determine.
Thanks for contacting me and I will keep you updated. Take