Florentine family name (6)
I believe the answer is:
medici
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">florentine family name</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for medici that I've seen before include "Name of great Florentine family 15-17th centuries" , "Well-known European family" , "Florentine ruling family" , "Name of powerful Florentine family in 15th-17th centuries" , "Florentine ruler" .)