Man pages matching name proc_tid_children in section 5:

proc_tid_children.5.en	debian 13 / manpages
proc_tid_children.5.de	debian 13 / manpages-de
proc_tid_children.5.fr	debian 13 / manpages-fr
proc_tid_children.5.pl	debian 13 / manpages-pl
proc_tid_children.5.ro	debian 13 / manpages-ro