parish at the mouth of the Mississippi in Louisiana, U.S., from Louisiana French, literally "persimmon" (18c.), probably from Miami/Illinois (Algonquian) piakimina.
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for plaquemines
News from officials in Plaquemines Parish indicated the capsule had been sighted and that the 11 workers were “safe and sound.”The BP Oil Spill Killed My Father
April 19, 2011
Sheila Ratiff of Plaquemines Parish told me about her cousin who called her in tears.Track the Oil Leak!
The Daily Beast
May 7, 2010