Hi Anita,
Yes, I too have read that shinnen can have several interpretations. At the time of my affirmation, I was told that shinnen means ‘true mind’. According to him ‘shin’ means true or faithful and ‘nen’ refers to state of mind. The full name is actually
Shakushinnen, (the Shaku referring to the ‘orginal’ Buddha Shakyamuni) but I was told not to use the full name, only shinnen, because using the full name would be pretentious/presumptuous, something of that sort, I’m not really clear on that.
Yes, of course, Jodu Shinshu is a Japanese Buddhist sect, but that’s whole other story.
….. john