I dislike
Lucas,
Lukas and
Luke, though for some weird reason
Lucy is one of my all-time favourites.
Matteo is too unEnglish for me, and in English
Matthew is one of the most boring names ever.
Sebastian sounds very grown-up and important; Seb is fine as a nn for all ages, so that's all right. But the
Bastian form has a very uneducated image where I live (with the Afrikaans pronunciation: Buhs-tee-ahn or, worse, Bahsyahn). As long as that's avoided, it's a great name.
Victor is, I suppose, an uncle name to me: DH and I both had an Uncle
Victor. Luckily they were both excellent men! I'd use it as an honouring mn. For a girl, I'd also like to use
Vickie as an honouring mn, after a friend whose full name it is.