First, if you will follow this link http://www.pueblolibrary.org/http://www.pueblolibrary.org/ use the "search" dropdown menu, and do to the obit database, there are 13 Lannon's listed-among them some of the names you mention;there are instructions there for ordering copies of these obits. Also-maybe yours? 1920 census, Pueblo,CO (faint-hard to read) Grover,Fred-34;born NY,parents born same;merchant wife-Fannie-3?;born CO;father born MA,mother born IL father in law-Lannon,John M.-age?;born MA,father born PA,mother born NY mother in law-Lannon,Emma-53?-born IL;fther born Ireland,mother born OH
1920 census,Pueblo,CO Lannon,Frank P.-64;born NY,parents born PA wife-Lucy H.-58;born UT,parents born England son-George T.-41;born WY;bookkeeper-office daughter in law-Florence-38;born CO;father born Canada-Irish;mother born Ireland granddaughter-Alice E.-3;born MN son-Granville-25;born CO;machinest-steel works daughter-Ruth-18;born CO;stenographer-Dr.Office son-Robert-17;born CO (In the 1930 census, Frank P.and Lucy are livng alone in Palisade,Mesa Co.,CO; he is 74,she is 68;he was 22 and she 16 when they married;he shows his father born PA,mother born NY, and he is a fruit farmer by this time) 1880 census for Evanston,WY shows Frank P,his wife Lucy,son George age 1 and daughter Mary 2m;there is also a Charles Lannon in Evanston, born NY,who is single,age 22, and boarding with another family.