Exhibit 21 Subsidiaries of Genworth Life and Annuity Insurance Company (As of March 21, 2007) Name Under Which Company is Conducting Company Name State of Incorporation Business - ------------ ---------------------- --------------------- River Lake Insurance Company South Carolina Not Applicable River Lake Insurance Company II South Carolina Not Applicable River Lake Insurance Company III South Carolina Not Applicable River Lake Insurance Company IV Bermuda Not Applicable Rivermont Life Insurance Company I South Carolina Not Applicable Jamestown Life Insurance Company Virginia Not Applicable