Are you refering to his name change in Sweden? He was born in Lulea, Sweden as Hans Peter Wahlstrom. He was my Grandfather. Which branch are related to, name does not sound framiliar. My father was Charles W. Walstrom, Sr., who was his son. I live in Portland, OR and Mina E. (Shobe) Walstrom died in our house in Oregon City, OR in 1941. Will be happy to make your Acquaintance. Take Care Now.