Include any DATES or approximate dates - birth/marriage/death - for this family, as no one can tell if you are looking for families from the 1640's or 1990's!
Put in any names that you know of to match those dates - include any spouses/siblings/children to help in the search.
If you go to familysearch.org you will find a search tool where you can enter names/dates/locations to help you with a free online search as well.
An example below shows over 300 Grogan's from that site- but without further details as mentioned above - it's hard to tell if any is a match.
304 results for >Name: grogan, Event: Residence, Place: Evert, Kentucky, Event Range: 1700-1900