Sipus
Could not find Sipontina in Logeion dictionaries.
Sipontina Proper-name adjective: neuter nominative plural, Proper-name adjective: neuter vocative plural, Proper-name adjective: feminine nominative singular, Proper-name adjective: feminine ablative singular, Proper-name adjective: feminine vocative singular, Proper-name adjective: neuter accusative plural of Sipus
Sīpūs, untis, v. Sipontum.
Sīpūs, ūntis, f., s. Sīpontum.
Sīpūs, ūntis, f. , c. Sipontum : Luc. 5, 377 ; Sil. 8, 635.