I think it looks really masculine. It even looks quite violent, maybe because of the similarity to "slayer" or maybe because it's a surname.
Thea is SO much better.
With the
Thea spelling, I like these combos:
Thea JosephineThea JessamineThea JulietThea MagdaleneThea CarolineThea OliveThea CassidyThea Rosalind