Sorry to bring up an old topic, but I've just joined and a search on LUFF brought up this thread.

I wonder if this Amelia/Elizabeth is even more complicated. I have an Amelia MORGAN married to a William LUFF in 1827. They had 2 daughters and one son - Anne, Elizabeth and Philip, all born Llandogo. By 1841 William has disappeared, but in Llandogo is an Amelia HULIN with daughter Ann. I wonder if Amelia MORGAN married William LUFF, but he died, she married again, becoming HULIN, so Elizabeth became Elizabeth LUFF HULIN - she is a similar age as the one you mention. Elizabeth was originally baptised Elizabeth Luff in 1831, she could have been re-baptised as Elizabeth LUFF HULIN when her mother remarried.

William LUFF was a fisherman, and Amelia HULIN is described as a fish merchant.

It might be worth looking further into this possible scenario.

Regards,
Jean.