I've got a family bible upstairs which dates back to the late 18th century. But I always had doubts whether it belonged to the family as someone had listed births and deaths for three or four generations from the late 19th century, but the surnames were 'Jones'. That's a very common Welsh surname, but which is not mine. The rest of the family is long gone, so there was no-one to ask.
Then quite a few years ago I Googled my father's name, just out of curiosity. And one hit noted his father's name as Edward - which was my grandfather. So I dug a little deeper and came across a web page that someone had started as a family tree record and listed there was Edward's wife's maiden name. Hang on, I thought...I dug out the bible and there she was. She'd been the girl listing all the births and deaths. It was my paternal grandmother.
So pleased that it was our family bible after all. She's listed two previous generations, so I can go back that far. I keep meaning to add the rest of the family line up to the present day at which point I'll pass the bible on to either my son or daughter. Then the grandkids will at least have one line back to one great great great great grandparent.
The guy who had looked into the family tree turned out to be a second cousin. I contacted him and it seems he remembered me from the late 60's as his grandfather had taken him along to our house to visit my grandfather. He recalled a 'cool looking guy with long hair'. I was 17 and he was about 10.