The record of the National Fruit Collection, at Brogdale in Kent, describes it1:
Thought to be from Iasi, Moldavia, Romania. First recorded in 1831. Fruits have coarse, soft flesh with a fairly acid flavour.
Where Domnesc came from.
Sources
Domnesc (accession 1958 - 103), National Fruit Collection, Brogdale, Kent (Defra).
Supports: the description quoted; the use; the fruit's size, shape and colours and the flesh, from the collection's characterisation; the picking time at Brogdale (mid october); the other names.