I am not sure what the L stands for will have to research more. The Richard L. Abernathy in my family was born in 1797 aug 20. died 1875 out 28 Grant co. Kentucky. Married to Elizabeth Chrisman who was born 1803 Jan 18 died Aug 31 1873.I have notes as to where they are buried if interested they had six children, one, Henry Clay was my great-grandfather. They also had a son Richard L born June 1835.in ky married to A martha. Does any of this help?