The Kaeru's status is an odd one.  They are not an official family in the sense of the Yotsu, but Rokugani law does acknowledge them as administrators of the City of the Rich Frog.<br/><br/>And your roll of 18 is enough to know where that city is.<br/><br/>EDIT:  I clicked on your link, and that just doesn't match earlier information.  It's possible that AEG tried to retcon the Kaeru, or it's possible that the Kaeru were recognized under Imperial law, but not by the Empire as a "family."  After all, the Mantis weren't given a name until well after their founding, and they made much more an effort to be noticed.