sociennus
Could not find socienno in Logeion dictionaries.
socienno Noun: masculine ablative singular, Noun: masculine dative singular of sociennus
sŏcĭennus, i, m. [socius],
- a fellow, comrade: tuos, Plaut. Aul. 4, 4, 32 (659).
sociennus, ī, m. (socius), der Kamerad, Plaut. aul. 659 G.