I'm new to macros, but not excel.

I have a pivottable, and want to write a macro to select specific, absolute
names of people. I record the macro, and this is what it gives me:

ActiveCell.Offset(20, -12).Range("A8,A6,A3,A1").Select
ActiveCell.Offset(20, -12).Range("A1").Activate
Selection.Group

I want it to select a person's name instead, but the code is off, but I'm
close...yet so far. Example like this may help....

With ActiveSheet.PivotTables("PivotTable20").PivotField s("LO Name (f451)2")
.PivotItems("SMITH, JAMIE").Visible = False
.PivotItems("BENJAMIN, CHERYL").Visible = False
.PivotItems("TONIS, KEN").Visible = False

In the active pivottable, I want to select these three names and group them.