You're right about verifying information that has been given to you. It might save you from making a BIG mistake.
When and where were these people born? Even a guess is better than nothing. I see you've used apostrophes to shorten some of the surnames. All surnames need to be spelled out.
Always start your genealogy with what you know. If you know information about your grandparents, include that with your query.
I can probably help you find or tell you where to find more information if you can send me where and when they were born. If you don't know that about your great grandparents, reply with your grandparents info.