Hi,
Seuca is Szokefalva in Hungarian. It's a village in Mures/Maros County, Transylvania, Romania.
I see in Reformed Church registers of Szokefalva a Janos (John) Szabo and Zsuzsanna Szabo from Hederfaja/Idrifaia, who married there on January 15, 1876 at their 27 and 35 years. Could be your ancestors. Maybe could help with some registers copies from here, just write more about ancestors - their faith or age, or something usefull for register researches.
Best wishes, Janos Kocs - from Transylvania, Romania
www.erdelygen.uw.hu