Helferich of Iowa

My Aunt Noladeen? or (family) Helferick Her Brother was Thomas P. Helferich he was kill during World War ll in the Pacific aboard the USS Bullhead (SS 332) Lost August 6, 1945.I Believe that there Mother was name was Florence, and I remember that they lived on a farm.My perents moved to Los Angeles in the early 40's and Thomas around 1944 in his Sailor uniform was there and Noladeen came later year that year later?My mother was Philemena Pearl (Helphrich) VinZant.
I need some information on my Grandfather Helferick.Thank you Ray