Ando is a noun meaning "gate" in Quenya. The word derives from the root AD-. Compare with annon in Sindarin.
Ando is also the name of the fifth letter of the Tengwar alphabet. In all forms this letter was used to represent the letter "d". 
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix E, "Writing", "The Fëanorian Letters"