I'm looking to find info. on the family/descendants of Johann Karl Stangl (d. 1930). He was my great-great-grandfather although he was not married to my great-great-grandmother Elisabeth Pfann (b. 1862 & d. ?). I know that he owned a butcher shop in the 14th/15th district of Vienna, which supposedly at the time was a more upscale neighborhood. He had 2 illegitimate sons by Elisabeth.
I'd appreciate any info.