Joanie · proper noun1
From Joan + -ie. Doublet of Ivanka, Jan, Janelle, Janet, Janey, Janine, Jeanette, Jeanie, Jeannette, Jeannine, Jen, Jenna, Jenny, Jessy, Jo, Jody, Juanita, Shanae, Sinead, and Vanna.
Joanie · noun2
Possibly a reference to Joanie Cunningham, a character from the US sitcom Happy Days (1974–1984), set in the 1950s and 1960s. Compare Joan (“a placeholder or conventional name for a younger lower-class woman”).
Etymology from Wiktionary, CC BY-SA 4.0.