Seja abençoado.
Abençoar
In Portuguese, you can say "saúde" which means health or "Deus te abençoe" which means God bless you in response to a sneeze.
In Brazilian Portuguese is "Deus te abençoe" If it is after someone sneezes, you say "Santinho." If it is just "God bless you", then it's "Deus te abençoe", both in European and Brazilian portuguese.
Que Deus te abençoe.
Deus abençoe tua avó.
Eu sou abençoado.
"Boa sorte e que Deus te abençoe."
In Brazilian Portuguese, you can say "Boa sorte e que Deus te abençoe."
In Brazilian Portuguese, you can say "que o Senhor te abençoe."
Better to say Bless You
Deus abençoe esta casa Deus abençoe esta casa
You just say bless you.