I am connected with a GREENING family in South Wales.
Thomas GREENING 1853-1928 m. Mary Ann BROWNING 1847-1928 in 1877. In 1881 they were living at Gelligaer, Glamorgan, Wales and Thomas worked with the railways. They had 5 chn from 1878 to 1888, Ada, Thomas, Lily, Albert & Elvira.
There were other branches of this family in the area as they had moved from Gloucestershire.
Do you have any details on your William GREENING ?