I, too, am a decendent of Ellis and Matilda Billmeyer. Their daughter Ellen ( Not Ella ) was my gggrandmother. Her tombstone says Ella but her given name was Ellen Mary Billmeyer. She married a man named Bopp and is burried in the Bopp family plot n Hawkeye, Iowa. My mother knew her and was sure of the correct first name. Ellen named her daughter ( my ggrandmother) Margaret Matilda Billmeyer, possibly after her sister and mother.