Stevefelten1
This is the Austria-Hungary both of your ancestors's were from
http://www.brainworker.ch/Oesterreich/Austria-hungary.pngThe most likely were from same village or same region. Common language to communicate in and common tradition to observe.
KUCHARs in 1995 in these locations in Slovakia
http://slovniky.korpus.sk/?w=kuchar&s=exact&c=qfdb&a...OSTROVSKY in Slovakia
http://slovniky.korpus.sk/?w=ostrovsky&s=exact&c=m6d...