Originally Freidrich Wilhelm Keyl.
He had many commissions for paintings from Queen Victoria.

National Probate Calendar
Frederick William Keyl Esquire 20 February 1872 Administration (with Will) of the effects of Frederick William Keyl formerly of 18 Cunningham-place but late of 67 Carlton-hill both in St. John’s Wood in the County of Middlesex Esquire who died 5 December 1871 at 67 Carlton-hill was granted at the Principal Registry to Sara Constance Keyl of 67 Carlton-hill Widow the Relict. Effects under 450 pounds. Resworn April 1875 under 1500 pounds

findagrave
Frederick William Keyl
Birth 1823
Death 1871 (aged 47–48)
Burial Kensal Green Cemetery
Royal Borough of Kensington and Chelsea, Greater London, England
Plot
Large family plot with two red granite crosses and one headstone and surround. The monument is located in the third row to the south of the path.
Memorial ID 53311623
Notes
German painter. In 1854, he settled in London and was apul of Sir Edwin Landseer. He painted sentimental animal and country scenes and exhibited at the Royal Academy.

see Wikipedia: https://en.wikipedia.org/wiki/Frederick_William_Keyl

India Select Births and Baptisms
Sarah Constance Woodin born April 10 1830, Dacca, Bengall, India, baptism October 2 1830, father William Woodin, mother Sarah

Prish Records St. Marylebone, Westminster, London
Marriage August 25 1852
Frederick William Keyl, of full age, bachelor, artist, residence St. Marylebone, father Christian Frederick William Christopher Keyl, merchant and
Sara Constance Woodin of full age, spinster, residence St. Marylebone, father William Woodin, merchant
by Licence by James Borrow, Curate
In the presence of Samuel Stowe? and Ed Bushorath?

In the 1861 census 18 Cunningham, New Church Street, Marylebone, Middlesex
Head Fredr. W. Keyl, age 37, Artist, born Germany, naturalised British Subject
Wife Sara C. Keyl, age 30, born Bengal
Daughter Mary C. Keyl, age 7, scholar, born Marylebone
Daughter Henrietta Keyl, age 6, scholar, born Marylebone
Son harold W. G. Keyl, age 2, scholar, born Marylebone
Son Ronald Keyl, age 5 months, born Marylebone
a governess, a house servant and a nurse

In the 1871 census 67 Carlton Hill, Marylebone, London
Head Frederick W. Keyl, age 47, artist, painter, born Germany
Wife Sara C. Keyl, age 40, born India
Son Norman Keyl, age 4, born London
Daughter Frances M. Keyl, age 2, born London
Son Baby Keyl, age 1 month [or perhaps week], born London
Daughter Henrietta Keyl, age 16, scholar, born London
Aunt Elizabeth Woodin, age 73, independent, born India
3 servants
[It would seem Elizabeth is Sara’s aunt. Sara Constance Woodin (daughter of William Woodin, merchant) married Frederick William Keyl in 1852 ]

National Probate Calendar
Sara Constance Keyl of Belgrave West Sandown Isle of Wight widow died 7 December 1891 Probate London 26 February 1892 to Harold William Albert Keyl hotel proprietor and Edward Albert Smith esquire Effects 3825 pounds