I'm not sure you could say my mother was interested in family history, but she certainly knew all her aunts, uncles, cousins, grandparents, g.grandparents etc. She was next to the youngest in a family of 10 children, so she learned a lot from her eldest siblings. Her g.grandparents had 11 children and most of those children also had large families, although her gran only had 6. Mum was always talking about (not the real names) Annie Brown, Lizzie Jones, Ada Smith, etc. etc. and when I researched her ancestors I found these were the women's maiden names. It seems because there were so many of them, quite often with the same first name, they always added the surname when talking about them so they would know which cousin(2nd/3rd etc) they were talking about. Some of the people she spoke about were spouses of cousins but unless male, still known by their maiden names. In fact when my mum mentioned my cousins she always added their surnames, even though I knew everyone of my 20 cousins and none had the same first name as another.