Ooh, I like it.
Sébastienne Guyot makes this name interesting for me.
https://en.wikipedia.org/wiki/S%C3%A9bastienne_Guyot
I like the association of an intrepid lady resistance pilot and engineer from the 40s named
Sébastienne. It makes the name feel quite daring and glamorous. I love the idea of "Bastienne" as a nickname.