Alfreida Davis, a housing activist and lifelong Brooklyn resident, died following brain surgery complications on Nov. 1, 2020. So it came as a shock for her family members to learn last week that on Dec. 1, 2020 — a month after Davis’ death — a district leader in Coney Island filed an official form signing up the late matriarch for a seat on the Brooklyn Democratic Party’s county committee. “I don’t know how or why her name was used in this way,” Cheyenne McGregor, Davis’ granddaughter, told the Daily News on Friday after being informed of the 2020 filing. “I find it disturbing.” The inclusion…