This combination is a perfect illustration of the tradition of using family names as middle names, which can be so helpful in tracing a family line.

Susanna GIBBONS COKE was the second daughter of William COKE and Susanna GIBBONS who married in South Devon at Brixham St. Mary's in 1775.

The parents had named their first daughter Susanna, after both mother and grandmother, (Susanna PULSEVER), but I assume the first child died, though I have not found a burial registration as yet. The second daughter was baptised with the same "given" name, plus her mother's maiden name of GIBBONS and of course her father's family name of COKE.