Someone had entered his birth date as 29/09/1868. That simply cannot be correct, since, for example, one of his sons was born in ca. 1870 (supported by original document; see under Sources). I changed the birth date to 1844, based on this MH profile, which seems to have been created by someone who made an effort to consult original sources: https://www.myheritage.dk/site-family-tree-248182831/pelzer?familyT....
However, if anyone knows of a different, correct, birth date for Ignatius, they should definitely correct what I've entered.