When Elizabeth Burr received a phone call a few days ago from someone asking about her family history, she initially thought she had been scammed. "I thought, 'OK, my identity has been stolen, I'll never see my money again,'" she says.

In fact the call came from a family history researcher looking for living relatives of Anna Jarvis, the woman who founded Mother's Day in the US over a century ago.

Anna Jarvis was one of 13 children, only four of whom lived to adulthood. Her older brother was the only one to have children of his own, but many died young from tuberculosis and his last direct descendant died in the 1980s.

So Elisabeth Zetland of MyHeritage decided to look for first cousins, and that was what led her to Elizabeth Burr.

When Elizabeth had been reassured that her savings were safe, she gave MyHeritage the surprising news that her father and aunts hadn't celebrated Mother's Day when they were growing up - out of respect for Anna, and her feeling that her idea had been hijacked by commercial interests and debased.