Langhans and Langerhans are different people and have different eponymous cells.
S A
SA
Pai
D003585:Cell Biology / Q000266:history*; D004850:Eponyms; D015744:Giant Cells, Langhans / Q000166:cytology*; D049672:History, 19th Century; D006801:Humans; D007801:Langerhans Cells / Q000166:cytology*