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  <xs:element name="VanguardSmallCapIndexInstitutionalFundMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="trmk_VanguardSmallCapIndexInstitutionalFundMember"/>
  <xs:element name="VanguardTotalBondMarketIndexAdmiralFundMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="trmk_VanguardTotalBondMarketIndexAdmiralFundMember"/>
  <xs:element name="VanguardTotalInternationalStockIndexInstitutionalFundMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="trmk_VanguardTotalInternationalStockIndexInstitutionalFundMember"/>
  <xs:element name="EmployeeBenefitPlanSECUREACTAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="trmk_EmployeeBenefitPlanSECUREACTAbstract"/>
  <xs:element name="EmployeeBenefitPlanSECUREACTTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="trmk_EmployeeBenefitPlanSECUREACTTable"/>
  <xs:element name="EmployeeBenefitPlanSecureAct20LineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="trmk_EmployeeBenefitPlanSecureAct20LineItems"/>
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  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="trmk_DocumentAndEntityInformationAbstract"/>
</xs:schema>
