This name for me is very special, it was the name of my beautiful Polish grandfather, who I miss so much. Anyway in England where he came to settle after the war, his new frinds and colleagues gave him the name "Tony" as it was easier to pronounce! What a crime! Wladyslaw was so much grander than that.
It seems to be a variant of Wieslaw or Wieslawa and these are often interchangeable and similiarly has Wladislaw and Wladislawa as it's male and female versions. When angry (which was often :)) my mother-in-law would also use the diminutions: Wladka and Wladja when referring to my then girlfriend.