Isium
Could not find Isin in Logeion dictionaries.
Isin Proper-name noun: neuter genitive singular of Isium
Isin Proper-name noun: feminine genitive singular, Proper-name noun: feminine nominative singular, Proper-name noun: feminine accusative plural, Proper-name noun: feminine ablative singular, Proper-name noun: feminine dative singular of Isis
I´SIUM (Isiu, Itin. Anton. p. 167; Isui, Not. Imp.), was a fort situated on the borders of the Thebaid and Heptanomis in Egypt, in lat. 27° 5′ N., and on the eastern bank of the Nile. Isium was about 20 miles SE. from the castle of Hieracon, and nearly 24 miles NE. from that of Muthis. Under the Roman empire a troop of British infantry (ala Britonum) was stationed there.
[W.B.D]