I'm trying to trace my maternal grandmother's family. Her married name was Katherine T. Haas. She was born in 1895. Her husband, my maternal grandfather, was Nelson Joseph Haas, born in 1891. Her maiden name was Katherine Theresa (or Teresa) Armstrong. She married Nelson around 1915. She had a sister named Mae Armstrong, who married Harvey Elston. Their mother's maiden name was Leahy. They lived in Los Angeles. Thank you in advance for help you may be able to offer.