I can't find any indication of anyone surnamed Lacko (pronounced "LOTS-ko") living today in the village of Sklene, but there are many in the town of Handlova, a few miles to the southwest.

You can search the digitized records from the Roman Catholic church in Handlova (listed under the name of the nearby town of Prievidza) here:

https://www.familysearch.org/search/image/index#uri=https%3A...