James Pendleton Vandiver (1869–1932) was a Kentucky fiddler, born there shortly after the American Civil War.

[1] Monroe's parents had both died by the time he was 16, and he lived part of the time with his Uncle Pen, in his two-room hilltop house in Rosine, Kentucky.

[2] Vandiver had been crippled earlier, and he made some money with his music.

"[3] On September 13, 1973, a monument in honor of Uncle Pen was unveiled by Monroe at the Rosine Cemetery.

[4] Another way he honored Penn's memory was to play the part of "Uncle Penn" in Ricky Skaggs' Country Boy music video.