Ghostwise

Ghostwise halflings were the most uncommon of the three halfling subraces.
Ghostwise halflings were generally very concerned (some might say obsessed) with family and clan. They do not experience as much wanderlust as the other halflings subraces. They were very elusive and were generally isolated from the outside world. They often lived a nomadic life in clans.

See the FR article for full details on the species.