Not a silly question at all. It's not just 'what we call them'. In larger companies pay, responsibilities, and seniority are all tied to your title. So, you don't just ge a raise, you get a promotion - say from Jr. Developer to Developer. On top of that, when someone is searching the intranet for the right person to consult with on a new project - they need to be able to fairly quickly get the right number to call. Someone with Lead, Supervisor, or Manager would be a better one to call than someone with Junior in their title.
Thanks for the responses. I made my suggestions and was promptly given a different title that I don't think I will share here. I will say however that it has 14 syllables in three words.