The surname, Toyotomi, was a honsei (original name of the clan which indicate its lineage) given to Hideyoshi TOYOTOMI, who became Kanpaku (chief adviser to the Emperor) and took control of the political power in the Tensho period.
豊臣姓とは、天正時代に関白となって政権を掌握した豊臣秀吉に与えられた本姓である。