On or before 04 Jun 1763 [his grandfather] William Wheler 5th Baronet (age 59) died. He was buried at All Saints' Church, Leamington Hastings on 04 Jun 1763. His son [his father] William Wheeler 6th Baronet (age 36) succeeded 6th Baronet Wheler of the City of Westminster. [his mother] Lucy Knightley Lady Wheler by marriage Lady Wheler of the City of Westminster.

On or before 27 Mar 1791 [his mother] Lucy Knightley Lady Wheler died. She was buried at All Saints' Church, Leamington Hastings on 27 Mar 1791.

In 1798 Knightley Wheler (age 44) died unmarried.

On or before 16 Apr 1799 [his father] William Wheeler 6th Baronet (age 72) died. He was buried at All Saints' Church, Leamington Hastings on 16 Apr 1799. His brother [his uncle] Charles Wheler 7th Baronet (age 68) succeeded 7th Baronet Wheler of the City of Westminster. Lucy Strange Lady Wheler by marriage Lady Wheler of the City of Westminster. His only son Knightley Wheler had died a year before without issue. His daughter [his sister] Lucy Wheeler (age 45) and her husband Edward Sacherevell Wilmot aka Wilmot-Sitwell (age 50) inherited the manor house and greater part, some 2,000 acres, of the Leamington Hastings estate.