Aaah... not so fast though, nonnie. He's mentioned his mom and that his family is blue collar, but the mom he could be referring to could easily be Anna and we just haven't gotten a mention of Rosalind yet. The comics pulled a fast one on readers introducing Rosalind too because you assumed you had met Foggy's mom before in that case too.
Re: Foggy's family in the comics
We'll have to wait and see.