I've posted an issue on github [0][1] mentioning that "firstName" and "lastName" is probably not a good representation of names. I don't actually know what the solution is, but this article [2] gives some great reasons why we tend to make incorrect assumptions about peoples names, which have the possibility of excluding some people form our tools based on their name alone.
[0] - https://github.com/jsonresume/resume-schema/issues/4 [1] - It seemed like an appropriate place to comment. Please let me know if there is somewhere else you'd prefer such comments. [2] - http://www.kalzumeus.com/2010/06/17/falsehoods-programmers-b...