Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
GOODBODY
As described in historical dictionaries
Patronymica Britannica (1860)
GOODBODY. A portly person— like the Fr. Ueaieorji.'i; perluqis, however, an oath : ' By God's bocfy,' — not unusual in the middle ages. The orthography in the H 1!,. is Godbodi, \vhich rather confirms iho latter derivation. Under the name I'ardew will be found some remarks on surnames derived from Oaths. See however tlie remarks under Body.