Enter Camillo and Archidamus.Archidamus is the name of some Sparta kings.
Archidamus appears only in the beginning of The Winter's Tale.
No one calls the name; no audience will hear the name.
Archidamus can spell Arcadia, the paradise of Countess of Pembroke's Arcadia.
Archidamus can spell Mary Sidney except letter e and n, which are mended by "Enter"; or Mary Sidney is a one-way anagram of "Enter Archidamus." This is how Wilton poets show their loyalty to their patroness Mary Sidney.
Camillo can be extracted from Christopher Marlowe. His full name is sealed in related lines later.