@Dave ***********
, (sorry, edited as I misread) the no not same those for an Non-O at the RTE/RTCG outside Thailand. Better to go to your local immigration office to get the latest requirement for a in-country visa.
This is a bit old general requirements from HQ. It may be able to give you rough idea. But the detailed ones are vary by immigration office. Also your nationalities could require additional documents.
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/6.FOR-PROVIDING-SUPPORT-TO-OR-BEING-A-DEPENDANT-OF-A-THAI-CITIZEN-SPOUSE-VISA-NON-O.pdf