Sorry- beginner - but thanks for replying 8-)
I've tried searching the records you mention on ancestry.com, but no luck so far. More details:
William George Jackson (1874-1939)
b. 102 West Wick, Bradwell, Essex, England
d. 17 Rowley road, Carshalton
m. Maud Louise King 25/12/1901
George Jackson (1848-1917)
b. Tillingham, Essex, England
d. Essex
m. Emma Eliza Brett
Henry William King (1843-1890)
b. Bermondsey, London, England
d. London
m. Emily Ellen Dobson
Charles Henry Herbert (1873-1918)
b. Kensington, Middlesex, England
d. 3a Baylin Road Wandsworth
m. Elizabeth Eliza Young 26/9/1899
James Joseph Young (1851-1941)
b. Kentish Town, London, Middlesex, England
d. ??
m. Elizabeth Sarah Haynes 21/1/1872
m. Emily Ann Grove 14/3/1886
I also tried using the rootschat search page you pointed me to, but all I got was a page of stuff beginning
{"next":"
http://hr-search-api:8080/searchapi/search?count=10&offset=10&query=%2Bsurname%3AKing%7E","facets":[{"token":"
http://hr-search-api:8080/searchapi/search?count=10&query=%2Bsurname%3AKing%7E&etc etc. ending with
},"score":0.73099995}],"totalHits":3840634,"offset":0}
I tried several times with the same result, so possibly too many hits to handle 8-)