:I was not notified about the deletion suggestion before the PROD expired, so I didn't find out about the deletion until now.  I do not see how either of the two guidelines you quoted are applicable in this case.  The article to which Vatican twins redirected was merged into the sibling article, not deleted.  For this reason, it would make sense for Vatican twins to now redirect to the "Irish twins" section of sibling.  As for WP:WINAD, that guideline was written in order to keep unencyclopedic stubs from being created.  If a concept has two different names, either name should direct a user to the appropriate article when it is typed into the search bar.  That is the purpose of redirects.  Would you object if I recreated Vatican twins as a redirect to Sibling#Irish_twins?