DNA/Mitochondrial match to Irene Crawford and/or Rebecca Crawford-DeWane

If you are a DNA match to me and/or my great-aunt Irene Crawford-Miley and our trees have nothing in common through the Crawford-Harris lineage, please help! We are searching for Irene's maternal grandparents and parents of her mother Isabella Welch-Crawford. Isabella was a left on a doorstep in Gobles, Michigan in 1889. Her father visited her yearly until she was 15. He was said to be a salesman from possibly the Detroit area and/or New York and Jewish and well to do. His name has eluded the family stories. Her mother would be assumed to have been from the southwest Michigan area. Contact me if you have any knowledge or interest in our pursuit! PS, Aunt Irene is 98 years old and would very much like to know this part of her mother's story.