He bears an Etruscan name. One of the inscriptions in the Mithraeum I of Ptuj states that he bought back the temple and restored it.
Other brothers from Poetovio
The sculpture of Mithras carrying the bull includes an inscription on its base.
Transitu / C(aius) Caecina / Calpurnius / temp(lum) redemi(t) et restitu(it)
For the Transitus, Caius Caecina Calpurnius bought back the temple and restored it