Is it honest for authors to put the parents' names as co-authors on books - when the child did the writing and the parent may be dead?

I’m thinking of the following:

Andrew Child (Lee Child’s son) took over the Reacher series two books ago, but Lee’s name is prominently on the front cover.

Dick Francis’ son Felix still puts his dad’s name as an author even though Dick has been dead for a decade or more.

Alafair Burke’s books usually have James’s name on the cover. (Actually not too much any more, but earlier in her career it was frequent).

Should authors rely on their parents’ fame?