Do users of One for All lose their original quirks? Izuku and All Might didn't have quirks when receiving One for All, but at least some of the former users had an original quirk.

Did these users lose their quirks along with One for All when they pass One for All to another user?
All of the previous owners of One For All have passed their quirks on to the power and its successors which would be highly indicative that the user of One For All retains their original quirk when receiving the power

One For All    


   Over time, One For All has amassed the Quirks of all the users. Now, Izuku is starting to manifest some of those Quirks. This first showed itself during the Joint Training Battle with Class 1-B. He starts with Blackwhip, a Quirk that reacted to Izuku's anger and wanting to capture Neito Monoma. Izuku has five other Quirks to discover and become able to use.





   One of the previous holders of One For All explained that seeing the traces is a side effect of the core of One For All itself growing. The original Quirk factors that had belonged to previous bearers of One For All had merged with the core of One For All. This previous holder of One For All explained that the core of One For All was concealed by the trait of One For All that stockpiles power and that the core of One For All is growing.