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, where the name first occurs, 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.

Attachment 274784