Gertrude E. Koop of Mattituck died March 16 at Riverhead Care Center. She was 87.
Visiting hours will take place Tuesday, March 20, from 10 a.m. to noon at DeFriest-Grattan Funeral Home in Mattituck. A funeral will be held the same day at 2 p.m. at Mattituck Presbyterian Church, the Rev. George Gaffga officiating. Interment will take place Wednesday, March 21, at 11 a.m. at Kensico Cemetery in Valhalla, N.Y.
A complete obituary will appear online March 20 and in the Thursday, March 22, edition of The Suffolk Times.