Who was the first one paid his/her dues? Tell the full name.
full name refers to first_name, last_name; first paid dues refers to MIN(received_date) where source = 'Dues'
SELECT T1.first_name, T1.last_name FROM member AS T1 INNER JOIN income AS T2 ON T1.member_id = T2.link_to_member WHERE T2.source = 'Dues' ORDER BY T2.date_received LIMIT 1