Knud Plesner Ibsen (3 October 1797 in
Skien – 24 October 1877 in Skien) was the father of playwright
Henrik Ibsen, and is widely considered the model for many central characters in his son's plays, including most famously Jon Gynt in
Peer Gynt and Old Ekdahl in
The Wild Duck, but also Daniel Hejre in
The League of Youth.