Matilda is on my list too, though I don't get the fiery association... I see it with a more calming and intelligent feel, maybe a yellow colour....
anyway
Tilda is also one of my favourite nicknames for
Matilda (I also like
Mattie). Not so keen on
Tilly as it is used quite a lot as a full given name here by young mum's and is associated with the living on benefits, got pregnant to get a council house culture that is around, it is also usually accompanied with a filler name e.g Tilly-Mae, Tillie-Grace, Tilly-Rose
~ Always end the name of your child with a vowel, so that when you yell the name will carry ~