No Anton Demsars that I know of although that's not saying much since I know little about my Demsar relatives. They were from the Vrsnik, Idrija, Brezje and Skofja Loka areas (mainly the 1st 3 areas) in Slovenia. My maternal grandmother is Mary Lazar Mihelsic. Her mother was Mary Demsar Lazar (b. Nov. 3, 1890, d. April 8, 1962). HER mother was Agnes Tusare Demsar, married to John Demsar. They lived in Brezje or thereabouts and Agnes was a female barber. They had 7-9 children of whom my Mary Demsar Lazar was one of the last; when her parents died (she was young) she went to live with an elder brother (in the Skofja Loka area, I believe). I know the name of only 1 of her sisters: Frances (her favorite sister, of whom I have a wedding photo and a photo of Frances with 1 of Frances' daughters). I have several other Demsar-related photos but we don't know who the people are. Mary Demsar Lazar came to the USA about 1913 or so.
I don't know John Demsar's father's name or the names of any of his brothers, male cousins or sons. Soooooo, there easily could be an Anton and I just don't know it. Sorry I can't be of much other help than that for now. Sure WISH I could!
Please tell me more about your family, if you'd like. Always happy to hear of more Demsars; you never know when, down the line, something may click for one of us (to show relationship or to help the other person)!
Thanks for writing! You're welcome to email me directly at: JAKIMIER@FWBC.COM