Hi
I hope someone can help you. In the meantime, here's a little more info from the Suffolk Burials Index...
Levi Lockwood, bur. 4 April 1773 at Eye
Elizabeth Lockwood, bur. 18 April 1773 at Eye
Both recorded as the children of Charles and Elizabeth
Alas, ages weren't noted.
Elizabeth would appear to be the second Elizabeth - baptised, buried (and presumably born) on the same day. (Unless it was the mother who died?)
The first Elizabeth obviously died in infancy, but I can't see her burial record.