First of all thanks very much for your kind offer of help.
It seems that the roots of John Relf do lay in Cranbrook. He eventually grounded his family in the East End of London where my grandfather grew up. My grandfather married a girl from Sissinghurst (near Cranbrook - my grandmother). It seems he was on holiday when he met her, staying with relations, but it's now too late to find out which relations.
23 Pomona Place, Fulham
Heinrich Lekinkeel, age 36, born D - Schlieselburch, Lodger, Gas Factory Stoker
Marie Lekinkeel, age 29, born D - Ottenburg, Wife
John Relf, age 20, born Cranbrook, Kent, Bricklayers Labourer
Liese Schulze, age 28, born D - Weilburch
Ernest Schulze, age 34, born D - AnhaltEnthen, Bricklayer
The full name of John Relf is actually John George Relf, but George has never been mentioned on any of the census returns.
I have no other information concerning the origins of John Relf or his parentage. Only from 1881 things start becoming clearer when he got married and grounded his family.
Once again, many thanks
Heidi