Who was the sibling that was adopted by the Cyrus family?

The oldest kid in the Cyrus family is Brandi who was born on 26th may 1987.Then it's Trace Cyrus who was born on 24th February 1989.

Then it is Christopher Cody Smith who is billy's son from his first wife. (Chis is 8 months older than Miley).

Destiny hope Cyrus(Miley) was born on 23rd November 1992.

Braison Cyrus was born on 9th May 1994.

And the youngest Cyrus in the family is:

Noah Lindsey Cyrus who was born on 8th January 2000.

p.s i am in the middle of making a movie at the moment about the family and when i have done it is going on YouTube my account is: AnyJrox