dropdown menu name in group

i have multiple groups for the selected attribute, and i have to name the dropdown menu in different name which also cause the records has too many columns. by giving an example, select a car brand and show car model for that brand.

below is my code:

[select* menu-carbrand id:sellcar-carbrand include_blank "Perodua" "Toyota" ]

[group group-perodua][select* menu-perodua id:menu-perodua include_blank "ALZA EZI M2 EDITION" "ARUZ AV" "ARUZ X" ][/group]

[group group-toyota][select* menu-toyota id:menu-815 include_blank "Alphard G" "Alphard V6 Royal Lounge" ][/group]

So question is can i use one dropdown name for multiple groups? instead of using menu-perodua and menu-toyota, i name both menu-carmodel. therefore my records will no have so many columns.
thanks