Genealogy / THE MEANING AND RESEARCH OF MY POLISH LAST NAME, SURNAME? [4500]

Hello,

I have two questions about names. I see different letters in the Polish alphabet. My fathers first name was Henry, would it be written the same way in Polish? Secondly, my last name is Tyszka. Can anyone tell me the meaning, and possible origin? Is it a popular name in Poland? He was born in a village in Ostralenka, how is that pronounced?

Thanks for your help!