The phrase "John Jane Q Public" is a reference to the average citizen, often used in legal or government settings. While there may not be direct synonyms for this phrase, there are other terms that can be used to convey a similar idea. Some of these terms include "ordinary person," "everyman," "commoner," "layman," and "average Joe." They all depict a sense of regularity and lack of special status or distinction. While these terms may have slightly different connotations and nuances, they all essentially refer to the same idea of an average, unremarkable person who represents the majority of the population.