Did a jarl ever have a jarless? Ah. Perhaps not.
As Hugo cites in his Wikipedia reference, the title of earl is derived from the Anglo-Saxon title. An eorl was the highest rank below the king in pre-Norman England, and there was no female version of the word. Indeed, the only female noble who had a title at all was the cyninge (queen). There existed a kind of abstract title, but it was pretty broad:
In all my reading about the period I have never encountered a female title of rank corresponding to eorl (itself replacing ealdorman). Indeed, even the famous wife of Eorl Leofric of Mercia, whom you know as Lady Godiva (1004-1080), is simply referred to by her given name, Godgifu.
Given that there was no traditional corresponding title of rank, it is not surprising that one should have been borrowed.
The male version of countess is sometimes count. From Wikipedia:
An earl was originally another title, but later came to be equivalent to count: