We have this too sometimes.
At first I thought it was kind of a protective thing for us - like no person is supposed to know her name, because when she's associated with us she might be in danger (of our abusers finding her).
But I noticed that we also don't even like to write her name in our private diary and wondered if there could be more to it.
Also recently one of our protectors got more active and told us "not to trust these people" (these people = medical staff, psychologists etc.).
And when I thought about that both of the above reasons are really not connected to the 'here-and-now'-reality but to the past where both would have been valid worries - I realised that it has to do with the core of our disorder: "attachment".
For us, over the past year three of us got attached to her and we try to trust her. Which lets our protective parts react from different angles. Some want to protect her cus she's a very good and skilled and kind therapist.
and some want to protect us from her cus they think she'll be the same as everyone else we met in that field before and that she'll hurt us and abandon us. so they don't want us to get attached to her.
In both cases they fear she will be taken from us - one way or another.
so not allowing her name to be spoken out loud or to be written down - for us - is one way to not aknowledge (?spelling?) her and our attachment to her...out of fear that she'll be gone soon and we'll have to forget about her.
so yeah. fear of abandonment. fear of attachment. those are our roots for that.
maybe it is completely different for you.
kat (12) with some help from others
ps. I don't understand two posts in this thread. it might just be my lack of language skills tho. but they upset me a little. so sorry if I post here just this one time and then go into hiding again.