Eleanor Anne Knight had the following siblings listed :-

Philip Henry ch 1865
John Thomas ch 1867
Margaret ch 1861 died within 2 days
Eleanor ch 1861 died within 6 days
William ch 1863
Sarah J. age 5 in 1881

There is a Philip recorded as butcher in 1894 at Kirk Michael and in the 1901 census a Philip McKnight, butcher, in Onchan. I mention the latter because a Gertrude Mcknight age 3 is listed in Onchan but that would make her Eleanor's niece, if applicable.

William ,the father, had the following brother and sisters listed on IGI:-

John ch 1823
Margaret ch 1824
Eleanor ch 1838
Jane ch 1829

Also Philip age 8 in 1851

IGI lists them as Knipe but 1851 census shows Knight. Mcknight appears later around the 1880's

No other signs of a Gertrude.

Len Faragher