91 Sioux Center, Iowa May 17, 2020 Gerrit Byker, 91, of Sioux Center, Iowa, died Sunday, May 17, 2020, at Sioux Center Health. Private family services were Wednesday, May 20, at Bethel Christian Reformed Church, Sioux Center, with interment in Grace Hill Cemetery, Hawarden, Iowa. Survivors include his wife, Tracy of almost 70 years, four children…