proposer         
noun [ C ] uk/prəˈpəʊ.zər/ us/prəˈpoʊ.zɚ/
 提议者;提出者
a person who suggests a subject for discussion
  The proposer of the motion tonight is Jonathan Hesk. 今晚动议的提出者是乔纳森•赫斯克。 
  提名人;推荐人
a person who suggests someone for a position or as a member of an organization