Fionna and cake
Cake
Her full name: Princess Fiona Fiona O_O
Marceline Sings the song "I'm Just Your Problem" in the episode of Adventure Time entitled "What Was Missing". The episode was the 10th in season 3, and the 62nd in the series. It aired on September 26 2011.
Fiona's maiden name in "Shrek" is Fiona Fionna. In the film, she is introduced as Princess Fiona, and her backstory reveals that she was cursed to transform into an ogre at night. The name reflects her royal status and the fairy tale setting of the story.
"If You Were Here" by The Thompson Twins
Cake
Her full name: Princess Fiona Fiona O_O
Fiona Cheeks's birth name is Larissa Kelley.
Fiona Wood's full name is Fiona Melanie Wood.
Burning Low
His name is Marshall Lee and he is the gender swapped vesion of Marceline
Fiona Apple's birth name is Fiona Apple Maggart.
Fiona Musson's birth name is Fiona Anne Musson.
Fiona Shaw's birth name is Fiona Mary Wilson.
Fiona Stanley's birth name is Fiona Juliet Stanley.
Fiona Crossley's birth name is Fiona Mary Crossley.
Fiona Lewis's birth name is Fiona Marie Lewis.