Annotations to James Joyce's Ulysses/Ithaca/639

Annotations
alias   an assumed name; otherwise known as.

(a mendacious person mentioned in sacred Scripture)   Molly is probably confusing alias with Ananias, a liar mentioned in the Acts of the Apostles 5:3: But Peter said, Ananias, why hath Satan filled thine heart to lie to the Holy Ghost, and to keep back part of the price of the land?