Jeffrey Thomas Mencken, son of Tom and Lauri Mencken, Plymouth Meeting, is celebrating his eighth birthday today, Sept. 30. Jeffrey is a grandson of Joseph and Kathy Grabiec, Wilkes-Barre, and Jeffrey and Pat Mencken, Warminster. He is a great-grandson of Robert Porter, Cape Cod, Mass.; the late Helen Porter; the late Dr. John J. Caffrey and Kathleen Caffrey; the late Joseph and Elizabeth Grabiec; the late Raymond Mencken; and the late Muriel Gefeller. Jeffrey has two sisters, Gillian Kathleen, 15; and Miranda Elizabeth, 13.