Middle name also appears as "Kenly."
Brother: Frederick Crayton Ainsworth (q.v.)
See History of Arizona medicine; collections of Orville Harry Brown, M.D. [AHSL Special Collections WZ 70 AA7 H673]: “Kenby”; born in Vermont; came to Arizona in 1880; wife: Nellie H. Trowbridge; Surg.-Gen. of Territory
“See also Bancrofts Works, Vol. XVII, p. 613.”
Quebbeman, Frances E. Medicine in territorial Arizona. Phoenix : Arizona Historical Foundation, 1966, page 326: “Kenly”
Bancroft, Hubert Howe. The works of Hubert Howe Bancroft. A. L. Bancroft & company, 1889, page 613: Frank Kenly Ainsworth, M. D., was born in Vt. and came to Ariz. in 1880. His wife is Nellie H. Trowbridge. He has been member of the council, surgeon-general of the territory, and president of the Medical Soc., residing at Prescott.
Source: http://books.google.com/books?id=JgYUAAAAYAAJ