Royal Profile: Tanit Lascelles

Tanit Lascelles was born 1 July 1981 as the first child of The Hon. James Edward Lascelles and his second wife, Lori Susan Lee {Source}. She has two paternal older half siblings and a younger brother, as well as two siblings-in-law, a niece and a nephew {Source}:

1. Sophie Amber Lascelles (1973)
1. Timothy Pearce (m. 2011)
1. Lilianda Pearce (2010)
2. Rowan Nash Lascelles (1977)
3. Tewa Ziyane Robert George Lascelles (1985)
1. Cynthia Lascelles (m. 2008)
1. Son (2014)

As she was born prior to her parents marriage in May 1985, she is not included in succession for the British throne. If she were to be included, she would be no higher than 67th place after her half-sister Sophie.

It's likely that she leads a normal life.