Is the name of the palace maid in the Tang Dynasty the word "ci"?

Yes.

In order to show his kindness and imperial power, the emperors of the Tang Dynasty would give names to their maids to show their importance and love for them. There are many palace maids, and giving names can better manage and distinguish them, avoiding confusion and confusion. The status and status of the maids in the palace are different. Giving a name can show the status and give the maids a better status and treatment in the palace.