My great great great grandfather was Reverend Charles Kennedy, Presbyterian minister of Maghera. I belive he was ordained in 1801 and retired about 1843. He died in 1855

I am trying to find information with regards to his date of birth, marriage and who his family were.

The Presbyterian Historical Society has records of all it's Ministers, and usually has some information on their family:

http://www.presbyterianhistoryireland.com/

Thank you. I contacted them and they were quite helpful but had very limited information. In fact less than I have already!