 According to Meginness ( 1892 ) , Colonel Plunkett actually spelled his last name " <unk> " , but the current spelling was established " by custom and the courts " . As of 2007 , it is the only stream officially named " Plunketts Creek " on USGS maps of the United States and in the USGS Geographic Names Information System . ( There is a " Plunkett Creek " in Tennessee which has " Plunketts Creek " as an official variant name ) . The possessive apostrophe is not part of the official name of the creek , although records from the 19th century often spell it as " Plunkett 's Creek " . The Native American name for Plunketts Creek is unknown . Two streams in the watershed have given their names to roads in Plunketts Creek Township : Engle Run Drive and Mock Run Road . 
