Deinde, a paucis initio facto, universi Romulum ‘deum deo natum, regem parentemque urbis Romanae’ salvere iubent.
Later, having begun with a few, all hailed Romulus 'a god born from the gods, the king and father of the Roman city.
Deinde isn’t exactly “later.” More like “then” or “next.”
a paucis initio facto – literally, “the beginning having been made by a few,” “a few having begun”.
Many thanks.