The English surname Hing is probably a variant of Ing, with a prothetic /h/ added at the beginning.
According to the International Genealogical Index of the Church of Jesus Christ of Latter-day Saints, the spelling Hynge is recorded as early as 1541 in Croydon, while there are various records of the spelling Hing throughout the 17th century in London and Kent.
[1] The English surname Ing originated both as a toponymic surname from the district of Ing in Essex (whose name is preserved in various places there such as Ingrave and Ingatestone), and from the Old Norse given name Inga.
Statistics compiled by Patrick Hanks on the basis of the 2011 United Kingdom census and the Census of Ireland 2011 found 343 people with the surname Hing on the island of Great Britain and none on the island of Ireland.
In the 1881 United Kingdom census there were 186 bearers of the surname, primarily at Kent.