Two Gentlemen of Verona is one of Shakespeare's earliest comedies. The two gentlemen in the title, Proteus and Valentine, are sent by their fathers to the imperial court at Milan, where they both fall in love with the emperor's daughter Sylvia. Unfortunately, Proteus was already in love with his childhood friend Julia...
Tropes featured in Two Gentlemen of Verona include:
Artistic License - Geography / Critical Research Failure: Averted: while the gentlemen and their servants take a ship to get from Verona to Padua (or Milan, the script says both at different times), and all three cities do not have access to the sea, the three cities did have access to an extensive network of canals linking Verona to Padua and Milan. Some of these canals are still around today, though their transportation uses have been replaced by modern transportation methods.
Proteus was named after a sea monster of mythology who could change its shape, indicating Proteus' inconstancy and treacherousness.
The servant Speed is said to have a "quick wit". Doubles as an ironic name, since he's constantly running late and "chidden for being too slow".
Crab the dog is probably named, not after the animal, but after a "crab-apple", commonly referred to simply as a "crab"—appropriate, since Launce calls him "the sourest-natured dog that lives".
Mister Muffykins: The "little jewel" of a dog that Proteus attempted to send to Silvia is implied to have been this; Launce contemptuously refers to it as a "squirrel". It's stolen from Launce by a bunch of marketplace delinquents, at which point he attempts to give his own dog, Crab, to Silvia, the logic being that Crab is ten times bigger than the other dog and therefore superior.
The Mourning After: Eglamour apparently vowed perpetual chastity after the lady he loved died.
Urine Trouble: In a monologue, Launce recounts a few humiliating experiences of this kind with Crab.
Nay, I remember the trick you served me when I took my leave of Madam Silvia: did not I bid thee still mark me and do as I do? when didst thou see me heave up my leg and make water against a gentlewoman's farthingale? didst thou ever see me do such a trick?