Henry Sewall (1544 - 1628; m. Margaret Grazebrook 1575) mentioned in his will ". . . my loving kinsman Reginald Horne . . . my cosen John Horne . . .." At this time in history, the terms "kinsman" and "cosen" were used interchangeably, so both John and Reginald (underlined in red above) were cousins of Henry Sewall.

    Thus, Henry Sewall (1544 - 1628) was certainly a son of Matilda Horne and William Shewell.  Note that various spellings of the Sewall name, including Shewell, Sæwall, Shæwell and even Showell, were used at this time.