Man pages matching name xmhierarchyopenallancestors in section 3:

XmHierarchyOpenAllAncestors.3.en	debian 10 / libmotif-dev
XmHierarchyOpenAllAncestors.3.en	debian 11 / libmotif-dev
XmHierarchyOpenAllAncestors.3.en	debian 12 / libmotif-dev