What is the Latin term for 'ally'?

The Latin term for 'ally' is "socius." This term was commonly used in ancient Rome to denote a person who is in a partnership or an alliance, whether in military, political, or social contexts. In Roman society, allies played a crucial role, especially in terms of forming strategic relationships between different states or communities.

The other terms provided do not carry the same meaning. "Comitatus" refers to a group of companions or followers, often associated with the retinue of a leader, while "consors" translates to a companion or share in something, but lacks the specific connotation of an ally as a strategic partner. "Allyius" does not appear to be a recognized Latin word and seems to be a misformation. Therefore, "socius" stands out as the correct and relevant term denoting an ally in the desired context.