You mention "last known address" are you looking for living people?You didn't include any dates, or approximate dates, in your query, so it is hard to tell.
There is an Ira J. Skirlock on the 1930 census Crosby Co, TX.He is 36 and born in TX, IL, MS, wife Willie E., and some children; plus living with them is his father Newton J. Skirlock 64, wid, b IL, IL, IL.Ira's wife and 3 of his 4 children were born in OK.
1910 census Bosque Co, TX, this looks like Ira and his parents, note one of his siblings born in OK, family must go back and forth between TX & OK:
Skirlock, Neweton, h, 45, M(1) 19 yrs, b IL, VA, IL
" Annie, w, 51, M(1) 19 yrs, b MS, AL, LA
" Myrtle, d, 12, b OK
" Leonard, 8, b TX
Combined info from TX Dth Idx and SSDI:
Skirlock, Ira J., b 30 Nov 1891; d 30 Apr 1976 Hale Co, TX; last residence Plainview, Hale Co, TX; SS card issued in TX.
Skirlock, Willie Ethyl, b 1 Jun 1900; d 17 Dec 1982 Hale Co, TX; last residence Plainview, Hale Co, TX; SS card issued inTX.
Happy Hunting (^_^)