Wow, it's the 13th, and suddenly there's a dearth of events. You can't really blame births and deaths on superstition, though. Surprisingly, the life event where people have the most control over the timing, marriages, has the most occurrences.
Linda Clark, daughter of Oliver Franklin Clark and Mildred Blanche Benson, was born July 13, 1941, almost definitely in Indiana. She is my 5th cousin once removed on my Gauntt line through the Clarks.
Angela Louise McHenry was born July 13, 1977. She is my 6th cousin.
Josiah Allison and Laura T. Gaunt, daughter of Hananiah Selah Gaunt and Margaret S. Scott, were married July 13, 1890 in Lumberton, Burlington County, New Jersey. Laura is my 1st cousin 3x removed via the Gaunts.
Aryeh Kamil and Eleanor Kardish, daughter of Itzak Kardish and Shirley Bordelay, were married July 13, but I don't know the year (although it should be before 1989) or the location (likely in Ottawa, Ontario, Canada, though). Eleanor is my 2nd cousin once removed on my Gorodetsky line through the Kardishes.
Mamie B. Mitchell died July 13, 1966 in Kings County, California at the age of 77. She was the wife of William Alvin Gaunt, son of James Knox Polk Gaunt and Sarah Naomi Boone, who is my 3rd cousin 3x removed via the Gaunts.
Andrew Earl Slentz, son of Ephraim Slentz and Zilpha Emily Gaunt, died July 13, 1969 in Henderson, Rock County, Texas at the age of about 81. He is my 4th cousin 2x removed via the Gaunts.