John KING married Eliza KING. 13 Oct 1828 @ Tackley.
**This seems very likely, seeing that Mildred KING appears to be born, c1828, according to the 1841 census.
Maybe Tackley PR's will hold more clues.
John KING c1805, from Kirtlington, Eliza KING c1811, from Tackley...........could be related going further back.

According to
OxFHS Kirtlington Pr's, John KING was baptised, 20 March 1803, to Charles & Eliz: KING.
Steve.
Taken from OxFHS Marriage Index. 1538-1837.**