Gere's the info from "The Traditional Ballad Index" entry here.

Sir Lionel [Child 18]

DESCRIPTION: (Sir Lionel) hears report (from a lady in distress?) of a murderous boar. Meeting the boar, he slays the beast. In the older versions, the boar's keeper then comes out to demand a price, and the knight then slays the keeper also.
AUTHOR: unknown
EARLIEST DATE:
KEYWORDS: animal fight magic
FOUND IN: Britain(Scotland(High),England) US(NE,SE,So)
REFERENCES (13 citations):
Child 18, "Sir Lionel" (6 texts)
Bronson 18, "Sir Lionel" (17 versions)
Randolph 7, "Lord Bangum" (1 text, 1 tune)
Flanders/Olney, pp. 60-61, "Old Bangum" (1 text, 1 tune)
Leach, pp. 100-103, "Sir Lionel" (2 texts)
McNeil-SFB2, pp. 157-159, "Ole Banghum" (1 text, 1 tune)
PBB 19, "The Jovial Hunter of Bromsgrove" (1 text)
Lomax-FSNA 272, "Old Bangum" (1 text, 1 tune)
Niles 13, "Sir Lionel" (3 texts, 3 tunes)
Chase, pp. 126-127, "Old Bangum and the Boar" (1 text, 1 tune)
Abrahams/Foss, p. 60, "Old Bangum" (1 text, 1 tune)
Silber-FSWB, p. 217, "Old Bangum" (1 text)
DT 18, JOVHUNTR* OLBANGUM*
ALTERNATE TITLES:
Wild Hog
The Jovial Hunter
Rurey Bain
Bangum and the Bo'
Wild Hog in the Woods
Rackabello
Notes: Many versions of this song have been stripped down to descriptions of the hunt and the fight. Others have subplots concerning Sir Lionel's brothers. - PJS
File: C018

There's 2 versions in DT

OLD BANGUM
JOVIAL HUNTER or SIR LIONEL

though there doesn't seem to have been any previous discussion here.

Hop this is some use.

Cheers!
Ian