A Riddle a Day -- 78 Logical and Mathematical Puzzles

Day 49 -- Solution

DAVID

Here is @dam_catching_potter's explanation:

Five hundred begins it, five hundred ends it,
D = Roman numeral for 500

Five in the middle is seen;
V = Roman numeral for 5

First of all letters, the first of all figures,
A = the first letter
I = the first figure (number - in Roman numerals)

Take up their stations between.
Join all together, and then you will bring
Before you the name of an eminent king.
DAVID

@PiMaster solved the riddle first! Great job!