In SK's phone book: KELEC in Mojmirovce, Kuralany, Banska Bystrica.
KELECOVA (ova a female ending) in Mojmirovce, Nova Vieska, Pezinok and Levice. www.zoznamst.sk
At least not many, which can be a blessing.
Take a look in EI at SZALVAs, KELEC, KELECZ, WRABEL, WRABELY, WRABELI, VEABELY, VRABALY, FRABELY, VRUBELY, VRABELYI, VROBELY, VREBELY and VRABELLY manifest. Were your ancestors Byzantine or Roman Catholic?
Have you located a baptismal record for a child that was born in US? I would think that the priest would have written a placename for the parents.
Your ancestors could have come thru Baltimore, Boston or Philadelphia if not thru Ellis Island.