Man pages matching name oldolduname in section 2:

oldolduname.2.de	debian 10 / manpages-de-dev
oldolduname.2.en	debian 10 / manpages-dev
oldolduname.2.es	debian 10 / manpages-es
oldolduname.2.ja	debian 10 / manpages-ja-dev
oldolduname.2.de	debian 11 / manpages-de-dev
oldolduname.2.en	debian 11 / manpages-dev
oldolduname.2.es	debian 11 / manpages-es-dev
oldolduname.2.fr	debian 11 / manpages-fr-dev
oldolduname.2.it	debian 11 / manpages-it-dev
oldolduname.2.ja	debian 11 / manpages-ja-dev
oldolduname.2.de	debian 12 / manpages-de-dev
oldolduname.2.en	debian 12 / manpages-dev
oldolduname.2.es	debian 12 / manpages-es-dev
oldolduname.2.fr	debian 12 / manpages-fr-dev
oldolduname.2.it	debian 12 / manpages-it-dev
oldolduname.2.ja	debian 12 / manpages-ja-dev
oldolduname.2.ru	debian 12 / manpages-ru-dev