Since my childhood, one of my aunt used to call me as "Brhaspati" whenever I failed to understand something which she tried to convey. I have asked her, what does it mean. She replied the same. Brhaspati means "makku" in tamil i.e one who is ignorant or a slow learner.
Ha, today I understood why Brhaspati which sounds like a name is used to denote that. It is indeed a name of an ancient Indian sage who also wrote Brhaspati Sutras (a text on materialism and atheism). Indeed I am a Brhaspati. 😇