XmCreateNotebook(3) on Linux
The text c12fef1e1faa, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
The Notebook widget creation function "XmCreateNotebook" "Notebook functions" "XmCreateNotebook"