In a book stuffed to the rafters with minor characters, "Hoppy Holohan" is one of the most minor. Joyce probably based him on an actual person that he learned about from Nora, but biographical information about this person has not been found. Holohan plays a fairly important (though ignominious) role in the Dubliners story "A Mother," but in Ulysses he is reduced to having two people ask two other people whether they know him.

JH 2019

Ghost sign on the old Finn's Hotel building on South Leinster Street near Trinity College, now a dental hospital. Source: comeheretome.com.