Man pages matching name xmvacreatesimpleradiobox in section 3:

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