That's interesting - wouldn't that be because the actual fathers changed their names in those cases back to the non-Russianized versions (Moishe/Mikhail) when e

That's interesting - wouldn't that be because the actual fathers changed their names in those cases back to the non-Russianized versions (Moishe/Mikhail) when e.g. emigrating to Israel when that ceased to be forbidden? But in any case, those particular candidates had their names and surnames changed but for whatever reason their patronymics were left intact.