Follower of Christ; princess
Tienna is a modern elaboration likely derived from the name Tia or Christina. It combines the diminutive 'Tia' with the popular '-enna' suffix, often associated with the Latin 'Titania' meaning giant or princess, or as a variant of the Greek 'Christina'.
Less common today
Tienna isn't in the latest US Top 1000. It last peaked at #12,605 in 1996.
US births per 5-year period, 1990βpresent (SSA data).