Hiding recurring results?

Hi all -
Hope somebody can help with how to hide repeated values in a column, and only display them ONCE.

Please see attachment. The names are in column "C" and the grey bar is not using any formula, just hardcoded. I want to apply conditional formula or something like that, to keep the names as they are, in the grey bar, but supress the names in the subsequent rows, if they are repetitions.

uaImV.png

Assuming your data starts in C1, select your range of cells and activate C1, then your conditional format formula is:
=IF(COUNTIF($A$1:A1,"="&A1)>1,TRUE,FALSE)
and assign the font to white if true.