Not that they claim to be on precisely the same footing as the high folks of Belgrave Square and Grosvenor Place, but that they stand, with reference to them, rather in the light of those illegitimate children of the great who are content to boast of their connections, although their connections disavow them.
There are no more uses of "disavow" in the book.
Show samples from other sources
She disavowed her assistant’s comments.
...and we have conjured them by the ties of our common kindred to disavow these usurpations,
Thomas Jefferson et al. -- The Declaration of Independence