Religion: not determined yet
Name: Arthur Wilde
First Appearance: The Joker #5 (Jan.-Feb. 1976): "The Joker Goes "Wilde"!"
Number of Appearances: 1
Ally: Thaddeus Wilde
Note: relative (son?) of late painter Thaddeus Wilde
The Joker #5 (Jan.-Feb. 1976) chronicles what happens when the Joker and his henchmen compete against the Royal Flush Gang to steal paintings by the late painter Thaddeus Wilde. One of the supporting characters in this story is Arthur Wilde, who is presumably a surviving relative of Thaddeus Wilde (perhaps his son).
Suggested links for further research about this character: