Relationship to andrew johnson "17th President of USA

Elizabeth Walker 1680-1725 married Edward Johnson and had 1 son Arthur Johnson ,born either 1688 or 1718 and his wife was margaret pharez and then comes their son Andrew Johnson b 1749 died unknown and his wife was Hannah Hinkle and they had Jacob Johnson b 1778-1812 who is my 2nd cousin 8 times removed (please verify) and then Jacob and his wife had a son who was the second Andrew Johnson born 1808 died 1875 who was the 17th President of the USA (please verify) and on the other side of family is the Son of Elizabeth Walker who married i believe for a 2nd time and had a son named Richard Allen born unknown and died 1755, as he had a son named richard allen born 1704 and died 1764. and then comes Susannah Allen b 1732- died 1805 who had a daughter named Elizabeth Hudson b 1770 died 1835 and she married James Simmons and they had a daughter named Susan Jane Simmons born 1789-1851 and she married Joshua Grace who had a son named Greenberry Grace born 1812-1884 and he married 2 x's to ann jane johnson who had their son William Green Grace born 1839-1885 and , then married anna henderson i think and had Charles Patton Grace b 1860-1946 (my great grandfather,) then comes my grandmother Harriette Sarah Frances Grace born 1894-1976 who married my grandfather Don McNeal Sr and had my father Don McNeal b 30 april 1919 and died june 10 1985 who married my mother Arlene Lois Williams b 16 july 1925 and she died Feb 28 1986 and they had 3 children , me (kristin born 31 dec 1949, my brother Douglas Scott, born 20 February 1952, and my sister Jeff Ann McNeal born 9 june 1953 died 29 Aug 1999. so i am related Andrew Johnson as a 3rd cousin 7times removed (please verify)