This could be him: „Izchak Avraham Vilhelm was born in Lodz, Poland in 1901 to Nakhman and Rakhel. He was a merchant and married to Sara nee Kalina. Prior to WWII he lived in unstated place. During the war he was in Pabjanice, Poland. Izchak Avraham was murdered in the Shoah (according to this source).“ - https://yvng.yadvashem.org/nameDetails.html?language=en&itemId=1522783&ind=1