First appearances of characters whose name contains “Impossible Man”"

IssueTitleNotes
11Fantastic Four (Vol. 1)1st Appearance of Impossible Man; 1st Appearance of The Popuppians; 1st appearance of Willie Lumpkin (Fantastic Four’s mailman); Origin of Fantastic Four; Origin of Impossible Man; Sub-Mariner pin-up
11Fantastic Four (UK Edition, Vol. 1)1st Appearance of Impossible Man; 1st Appearance of The Popuppians; Origin of Fantastic Four; Origin of Impossible Man