Shakespearean doggerel

[neadods]

Does anyone lie awake at 4 a.m. and wonder why, if Shakespeare wrote in iambs, his character names tend toward dactyls or amphibraches? Or is it just me lying awake in the wee hours going:
Higgilty piggilty Romeo and Juliet
Ruin the meter in which their plays scan
Benedict and his dear Beatrice likewise, and
Richard the Third, that poor mistreated man