Hey Rawiri, I've just read manmac's reply to you in Armed Forces. Seems my idea was not as wacky as I thought!
Here they are in 91 and 01. Can't find them before that:
BIRTHS
Knebel, Rudolph William
September q, 1890
Bethnal Green , Greater London London Middlesex
1c/238
1891
45 Quinns Bldgs, Bethnal Green, London
Knebel, Rudolf abt 1856 Germany Head, boot finisher
Knebel, Annie abt 1854 Germany Wife
Knebel, Alfred abt 1884 Whitechapel, London, Son
Knebel, Elsie abt 1882 Germany Daughter
Knebel, Emma abt 1887 Mile End, London Daughter
Knebel, Henry abt 1888 Bethnal Green, London Son
Knebel, Rudolf abt 1890 Bethnal Green, London Son (9 mos old)
1901
45 Quinn’s Sq Bldgs, Bethnal Green, London
Rudolph Knebel abt 1857 Deu Foreign Subject, Deu Head, boot finisher
Annie Knebel abt 1854 Deu Foreign Subject, Deu Wife
Bertha Knebel abt 1900 Bethnal Green, London Daughter
Emma Knebel abt 1887 Mile End, London Daughter, waistcoat machinist
Henry Knebel abt 1888 Bethnal Green, London Son, errand boy
Maud Knebel abt 1897 Bethnal Green, London Daughter
Rudolph Knebel abt 1891 Bethnal Green, London Son
Guess you'll have to go to Germany to get further back. There is a Knebel family site (American) that traces their branch back to Germany. Could be a connection. Google it!
Ros