Illinois passes a good law, for once.
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Gender Identity Protection (HB 3552/PA 99-0417): Provides that the written directions a person leaves regarding disposition of that person’s remains may include instructions regarding gender identity including, but not limited to, instructions with respect to appearance, chosen name, and gender pronouns, regardless of whether the person has obtained a court-ordered name change, changed the gender marker on any identification document, or undergone any transition-related medical treatment.
So if you are in Illinois, and your family doesn't approve, make a Will and be buried the way you want.