I'm Iwaszko also ! I live in USA. Just came from a Iwaszko Family Reunion in Poland (over 80 people in attendance). My father Wladyslaw born in Nowogrodek in 1930 has 9 siblings. His Parents were Antoni (died 1935) & Anna Iwaszko (died1959). My father doesn't know much about his grandparents only that his grandmother name was Apolonia Iwaszko.
I'm in charge of making Iwaszko Family Tree and I'm looking for help to find more information about Iwaszko descandents and the name.