Frederick was still unmarried at the time of the 1911 census and living with his parents at Malkins Bank Farm, Betchton, Sandbach, Cheshire:
James Knibbs Head Married 57 Farmer Oxfordshire
Mary Ann Knibbs Wife Married (32 years) 53 Farmers Wife Staffordshire
Beatrice Knibbs Daughter Single 22 Domestic Duties at Home Betchton
Sydney Knibbs Son Single 19 Farmers Son Working on Farm Wheelock
Fred Knibbs Son Single 17 Apprentice to Smith Wheelock
Elsie Knibbs Daughter Single 15 Domestic Duties at Home
Harold Knibbs Son 14 Farmers Son Working on Farm Wheelock
Leonard Knibbs Son 12 School Wheelock
Kenneth Knibbs Son 8 School Betchton
Jessey Wainwright Man Servant 19 Labourer of Farm
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We see Frederick, Elsie and son James living at Lodley Smithy, Hassall, Congleton, Cheshire, at the time of the 1939 Register.
FrederickKnibbs 25 Sep 1893 Pig Breeder & Poultry Farmer Agricultural Smith Married
Elsie Knibbs 03 Mar 1894 House Work & Assistant Married
William (J) Knibbs 25 May 1922 Commercial Motor Body Builder Single
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From the Crewe Chronicle - 06 August 1970:
MR. F. KNIBBS
The funeral took place recently of Mr. Frederick Knibbs. of Lodley Smithy, Hassell, who died at his home. He was 76.
The Rev. F. Bishop officiated at a service at Winterley Methodist Church. and the interment was in Sandbach Cemetery. Mr. C. Barnett was at the organ.
The mourners were: Mr. W. Knibbs (son), Mr. and Mrs. K. Knibbs (brother and sister-in-law), Mrs. H. Smallwood, Mrs. S. Johnsen. Mr. and Mrs. R. Antrobus, Mr. Donald Antrobus, Mrs. G. Tomlinson, Mr. and Mrs. C. Barnett and Mrs. Mary Barnett (nephews and nieces), Mr. G. L. Thomlinson, Mr. and Mrs. W. Bailey, Mrs. 0. Jones, Mr. C. Bailey, and Mr. and Mrs. R. Bailey (brothers-in-law and sisters-in-law), Mrs. A. Forster, Mrs. I. Dobson, Mr. and Mrs. Beresford, Mr. T. Bell, Mr. W. P. Knight, Mr. and Mrs. R. Fleet, Mr. H. Fleet. and Mrs. A. Evans.
The bearers were: Messrs. P. Barnett and G. Tomlinson (nephews), M. Antrobus and D. Antrobis. Wreaths were Inscribed: Loving wife Lily and son Bill; Kenand Kate; Doris, Margey and Gwen; Olive and family; Bill, Emmie and all the family; Aunty Poly and Amy; Derek, Don and Roy; Lil, Don and Family; Levi, George, Thelma and Famiy; Joannie; Reg, Joan, Julie, and Nancy; Marion, Cliff, Phil and the Mary's Families; Winterley Methodist Church Trustees; Walter and Milly; Mr. and Mrs. Brassington and Family; Mr. and Mrs. Wilkinson; Jean, Rex and Mark; Mr. and Mrs. H. Beresford; and Mr. and Mrs. J. W. Dale and Family, donations to Methodist Chard.
Mr. W. Farr, was the undertaker.
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Our gratitude goes to the members and volunteers at Billion Graves web site for recording the details, in memory of Frederick.
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Our gratitude goes to the members and volunteers at Find A Grave web site for recording the details, in memory of Frederick.

I suspect this may have been Lily Antrobus who was born in either 1899 or 1901 in Runcorn, Cheshire, and died in 1987 at Congleton, Cheshire.