THere are also two men named Jerzy and Konrad Strozanski listed in the telephone directory living in Gdansk.
There is a place you can write in Warsaw to locate him.If he is still living, they will send him a letter for you.
Centralne Biuro Adresowe Sekcja Zapytan Zagranicznych ul. Kazimierzowska 60 02-543 Warszawa POLAND
You can write your letter in English. They will reply in Polish. Give them as much information as you can. A must is the village or town in which they lived. If you know the province, that helps, as there are many towns with the same names in other provinces. Give as much information as you can, i. e. your ancestors full name dates of birth, siblings names and where they were from. In other words you are giving them all the data they need for you to connect with the known relative you wish to contact. Give them that person's full name and their ancestors. It may take up to a year to hear from anyone. They will not let you know where your relative is. They will contact him, and if they wish to reach you, they will. Send a letter to your relative in another envelope for them to mail it to them. Tell them your relationship to the person you wish to contact. Remember: Nothing ventured, nothing gained.
NOTE: They will not try to help you if you do not present enough data to find your family member. They will not go on a wild goose chase for you. Good luck.
Good luck in your search.I hope very much that you will find your father.