Student Profile: Wislicki

Found four males with last name Wislicki, one called Severyn and the others Seweryn.

I found the first Severyn Wislicki on the Lodz Guetto labor cards, his get (birth date) appears as 6-5-1930, Wohnh (address) as fischgasse 11/17

In the holocaust database I found:
1. Seweryn Wislicki, no birthdate, address 30. Str. 12
2. Seweryn Wislicki, date of birth 06 May 1931, address FISCH 11 17, FISCH 8
3. Seweryn Wislicki, date of birth 06 May 1936, address ZIMMER 12 4

Do you think it's possible all of these are the same person? The addresses and dates of birth are very similar.