Geni gives his parents as Richard and Joan but cites
The Visitation of the County of Devon, 1564, https://ukga.org/browse.php?action=ViewRec&DB=13&bookID=136...
which contrary to the profile, shows
John Champernon, s. de Campo Ernulhi and Unknown as parents of Oliver Champernon who married Egelina, d. of Hugh Valletort.
His parents should be changed to John and Unknown, which also solves the problem of him marrying his aunt, mentioned in the previous discussion.