Popov is the northern part of the municipality of Štítná nad Vláří-Popov in district Zlín. Situated in the valley of the river Vlara, about 27 km southeast of the town Zlín.
Registers of the Roman Catholic parish office Štítná nad Vláří (years 1787 - 1895) or from parish office in Brumov na Vláře (years 1634 - 1787) can be found on-line on web site of Moravian Regional Archive in Brno: http://actapublica.eu
In parish register Štítná 4736 on folio (snap) 28 is written:
Born November 8, 1865 in Popov Nr.2 child Marina, daughter of Martin Slabenak, the owner of the land (= peasant) in Popov (Popukeř), son of living Martin Slabenak, výměnkář (=pensioner) living in Popov and his wife Marina nee ? from Popov. Mother: Rosina daughter of the deceased Martin Staněk, peasant in Popov and his wife Rosina nee? from Štítná. Below note: Married in (today Bratislava?) Prešpurk? (in church) St. Martin August 29, 1909 with Frantisek Comissar? 268/909.
Your Mary had to be at that time (1909) in New York or not?
On page 155 (same parish register) is index of births 1860 – 1895. There are a lot of children from families with the surname Slabenak, but I see no other Mary circa 1862-1865 .... Maybe something will help you. Greetings