BTW -- Herman Holcomb appears to have no relationship to Alonzo H. Holcomb or at least I saw none --
HOWEVER -- the FAG Site states "Find A Grave Index," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:QVVD-31ZT : 27 July 2019), Alonzo Holcomb, 1891; Burial, Topeka, Shawnee, Kansas, United States of America, Topeka Cemetery; citing record ID 12946229, Find a Grave, http://www.findagrave.com.
There is an 1880 census record to use to cite DOB
"United States Census, 1880," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:MF5L-2TG : 12 August 2017), Alonzo Holcomb in household of William S Curry, Topeka, Shawnee, Kansas, United States; citing enumeration district ED 9, sheet 176A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,397
It may be a case where only several census and a burial record will be found to support his DOB, DOD ... and uncommon but not unheard of situation, usually ref to women