A quick search of SSDI produced upwards of 600 (very conservative estimate) Willie Jones before even getting to the ones with a middle initial. Of course most of them were not from Kentucky. From the info you supplied upfront I estimate he was born in 1944. By supplying as many details as possible, you help searchers narrow it down. Was it really Willie or was it William, date of Birth, wife's name etc, etc. Here is a sample of some Kentucky results, but none of the birth years was close to my estimate. This was the total number found from Kentucky. Knowing who he was will greatly increase chances of finding your siblings.
JONES, WILLIE was born 13 February 1911, received Social Security number 400-xx-xxxx (indicating Kentucky) and, Death Master File says, died April 1979. Research in ZIP Code 40741. Research in ZIP Code 40741
Source: Death Master File (public domain). Check Archives for WILLIE JONES
JONES, WILLIE was born 22 July 1905, received Social Security number 400-xx-xxxx (indicating Kentucky) and, Death Master File says, died March 1973. Research in ZIP Code 47250
Source: Death Master File (public domain). Check Archives for WILLIE JONES.
JONES, WILLIE was born 24 September 1875, received Social Security number 400-xx-xxxx (indicating Kentucky) and, Death Master File says, died January 1969. Research in ZIP Code 40422
Source: Death Master File (public domain). Check Archives for WILLIE JONES.
JONES, WILLIE was born 25 April 1881, received Social Security number 400-xx-xxxx (indicating Kentucky) and, Death Master File says, died February 1963
Source: Death Master File (public domain). Check Archives for WILLIE JONES.
JONES, WILLIE was born 31 October 1909, received Social Security number 400-xx-xxxx (indicating Kentucky) and, Death Master File says, died May 1980. Research in ZIP Code 40065
Source: Death Master File (public domain). Check Archives for WILLIE JONES.
I understand we are looking for possible siblings, but it is important to know who your father was. I have removed ssn on the above names just so as to not step on anyone's toes. Post what you know and make sure it is accurate. Merry Christmas !!!