I don't think Estelle had any children. There was a Parr daughter. Her name was Thelma Irene Parr and she was my grandmother. She married my grandfather, LeVerne C Leroy in Ohio in 1916. They had three children, LeVerne Jr, Albert, and my father, Raymond.
I have been searching for information on Estelle and have found a little, some census entries and a number of arrivals and departures from the US to Bermuda for various performances. I have also found a number of newspaper articles describing Estelle's and Albert's appearances in the Washington DC area. They appeared a number of times at the National Theater.
Are you related to Estelle? If so, how?
This is a fun and interesting connection.
Looking forward to hearing from you.