Kentucky:  A History of the State, Battle, Perrin, & Kniffin, 3rd ed., 
1886. Warren County.

JOSEPH D. DUNCAN, Warren County, was born in Virginia in 1814 and is of 
Scotch descent.  He is a son of Edmond and Harriet (Dulaney) Duncan, and 
the eldest son of a family of ten children.  His father immigrated to 
this State in 1817, when it was still in many places a "cane-brake" and 
deer and turkeys were plenty, together with other game.  Joseph D. was 
brought up on the farm and received his education in the country schools 
and in Bowling Green.  He married, in June, 1841, Jane Covington.  They 
have had six children, five of whom are still living.  Their names are 
as follows: Drucilla, Eliza C., Euclid M., Henry F., Woodford D. and 
Simon B.  Mr. and Mrs. Duncan are members of the Baptist Church.  He is 
and has been a member of the Masonic order for thirty-five years.  He 
was a Whig during the existence of that party, and since it became 
extinct he has affiliated with the Democrats.  Mr. Duncan is a great 
lover of violin music and plays well on that instrument.

Duncan Dulaney Covington
=
VA

http://www.rootsweb.com/~kygenweb/kybiog/warren/duncan.jd.txt