Remember to try the spelling of Louis for Lewis.
From the census records.
1900 - Iowa - Boone Co - Yell Twp - Page 285 - 14 Jun 1900
278 / 290
Adair, Louis - Head - born Apr 1863 - age 37 - Male, Married
born Illinois - father born Indiana - mother born Indiana
Adair, Louisa - Wife - born Feb. 1874 - age 26 - Female,
Married 12 years - 6 children - 4 still living -
born Illinois - father born Pennsylvania -
mother born England
Adair, Martha - daughter - born Sept. 1889 - age 10 -
single - born Iowa
Adair, Mabel - daughter - born Feb. 1893 - age 7 - single -
Adair, Gertrude, daughter, born Iowa
Adair, Harold - son - born Aug. 1898 - age 1 - single -
1910 - Iowa - Polk County - 5th Ward Des Moines - Page 231
20 Apr 1910
78 / 105 - 219 East Grand Ave.
Adair, Louis - Head - age 49, first marriage 29 years,
born Illinois, father Illinois, mother Illinois,
laborer - Buildings
Adair, Louise - Wife, age 48, first marriage 29 years,
9 children, six still living - born Iowa, Father Unk,
Adair, Gertrude, daughter, age 17, single, born Iowa
Adair, Harold, son, age 15, single, born Iowa
teamster for Roofing Co.
Adair, Fay, daughter, age 11, single, born Iowa
Adair, Frankie, son, age 7, single, born Iowa
I assume Fay is your Fanny. The 1900 data was hard to
read and I may have made a transcription error, so you
should check it yourself. I could not find the spelling
of "Louis Adair" in the 1920 census. Also remember we don't
know who gave the information to the census taker (husband,
wife, child, neighbor).
Good luck in you research.