The inscription is a fun puzzle. I think you're right about the name, and F for filius as usual. I'm not sure about all the abbreviations either, but EQ must stand for eques, a knight, as we can see, from the Ala [Gallorum] Indiana. That's a wing of auxiliary horsemen from Gaul, named after the first commander Julius Indus, according to Wikipedia. Roman soldiers came from all over the empire, but not all the way from India.