Frederick George Leonard KNIBBS, son of Richard James KNIBBS and Catherine MORRIS , was born bet. July and September, 1881 in Battersea, London, Middlesex, England. He died 13 August 1940 in Liverpool South District, Lancashire, England. Mary May UNKNOWN was born 07 May 1888. She died bet. October and December, 1974 in West Lancashire District, Lancashire, England.

Notes for Frederick George Leonard KNIBBS:

It's quite possibly this Frederick we see in 1911, living at 9 Paragon Place, Surbiton, Surrey:
James Bonham Lewin Head 45 Married Coachman Unemployed St Martins in the Fileds
Alice Anne Lewin Wife 38 (21 years) Portsea Hampshire
Florence Louise Lewin Daughter 20 Single Domestic Unemployed Portsea Hampshire
Bertram Frederick Lewin Son 16 Single Gardner Surbiton Surrey
Constance Lewin Daughter 14 Single Servant Surbiton Surrey
Reginald Lewin Son 11 Scholar Surbiton Surrey
Leonard Lewin Son 8 Scholar Surbiton Surrey
Elsie Alice Lewin Daughter 4 Surbiton Surrey
Fredrick George Knibbs Boarder 28 Shop Assistant London SW

Knibbs Frederick George Leonard of 77 Orrell-lane Loverpool died 13 August 1940 Probate Liverpool 28 October to Mary Hay Knibbs widow. Effects £2651 8s. 2d. Resworn £2551 8s. 2d.

Sources for Frederick George Leonard KNIBBS:

  1. FreeBMD, gave Wandsworth District 
  2. GRO England & Wales,
  3. - England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1966,
  4. 1911 British Census,

Notes for Mary May UNKNOWN:

Not really sure of Mary's name.
The statement re Frederick's estate had her name written as Hay, which indicated it may have been her maiden surname.
However, her death record has it as May, and therefore, quite probably a second Christian name.