Is "Sri" only an honorific prefix to Aurobindo ?

30 November 1961
Dear little sister,
Mother has shown me the letter you wrote to her about the problem of "Sri" that is troubling you. She wishes me to communicate to you my view of the matter. Well, I shall be frank and forthright. It is an error to think that “Sri” is only an honorific prefix to Aurobindo which is the real name. It is not so. “Sri” does not mean Mr. or Monsieur or Sir, etc.