In this instance, "Hereafter Hollow" is a Proper name. Section11.8 in the instruction manual speaks to Short-Form Words in Proper Names and Rule XVI.47.b in EBAE tells us that a short-form word should be used as the whole proper name only. In the instance of "Herafter," that is a compound word with two short-forms and thus cannot be used.
I hope this helps. 🙂