The crossword solutions for the term 'ABBY TWIN OF' are ANN (3 letters), REMUS (5 letters), ENG (3 letters), NAN (3 letters), and ESAU (4 letters). ANN is a reference to the biblical figure of Anna, the TWIN sister of Mary. Remus is a reference to the Roman mythological figure of Remus, the TWIN brother of Romulus. ENG is a reference to the English language, which is often referred to as the 'TWIN' of American English. NAN is a reference to the Nanay language, which is spoken in the Philippines and is considered to be a 'TWIN' of the Ilocano language. Finally, ESAU is a reference to the biblical figure of Esau, the TWIN brother of Jacob.