Hello "Searcher"! I have Craig's in my line.. but let me tell you some basic info that you are always going to need to provide and/or use as you go froward with your search..

Names are necessary of course.. but you will soon find out how many people have had the same name as what you are looking for...

Anyhow... give us at least some general birth and death dates of the folks that you are looking for. Location is key..
Country, State, City, County etc... where born ... where died.. spouses names and childrens... Maybe then someone will see a connection to what you are looking for. I have tough ones too.. Craig.. Smith... Davis... Tough in respect that they are common names. Anyhow.. gotta run. Look forward to seeing more info on the Craig's listed.