Burke has Thomas Staunton of Longbridge (= Margery) and Thomas Staunton of Staunton (=Anne) as two different people. No mention of either of them being knighted. Certainly the latter one wasn't as he is "esquire" in his will.
https://tinyurl.com/y9wqppe8
https://tinyurl.com/y8jlqo9x
will of Thomas of Staunton
ttps://tinyurl.com/y8spcv7s