Sibling nickname

Our first is [name]Charles[/name] and we are thinking about [name]Matilda[/name] if we have a girl for the second (find out in a few weeks).

We call the first [name]Charlie[/name]. Looking for opinions on [name]Mattie[/name] or [name]Tilly[/name] for nickname?

Our bub was almost a [name]Matilda[/name] - love [name]Tilly[/name] as a nn - pretty but not overly feminine . I find [name]Matty[/name] quite masculine as a nn for [name]Matilda[/name]. I also love [name]Tilda[/name] for a teen/young lady. A very versatile name is [name]Matilda[/name] = )

I like [name]Mattie[/name] as a nm for [name]Matilda[/name].

I like [name]Mattie[/name], but think it might run in with all the Maddies out there. I like [name]Tilly[/name] or [name]Tildy[/name], but find them a bit flimsy. My favorite [name]Matilda[/name] nickname is [name]Milly[/name]/[name]Millie[/name].

I like [name]Tillie[/name] or [name]Millie[/name].

I vote for [name]Mattie[/name]. I really dislike [name]Tilly[/name]/ie, and [name]Millie[/name] sounds really elderly to me. I know a little girl who’ll be two soon named [name]Martha[/name] who goes by [name]Mattie[/name] - it’s incredibly endearing.

I like either [name]Millie[/name] or [name]Tillie[/name], [name]Mattie[/name] sounds too masculine for me personally

I like [name]Tillie[/name]!!! [name]Tilda[/name] is a great suggestion too!

I hadn’t even thought of tilda or [name]Millie[/name](although that was my childhood dog, so I would feel weird naming my child that.) Thanks for your thoughts!

[name]Matilda[/name] is one of my favourite names! I love the nickname potential; [name]Millie[/name] or [name]Tillie[/name] as the baby/toddler grows, then once she could choose or begins to become older, stick with one of those, or go on to [name]Tilda[/name] (recently begun to love this nn) and maybe [name]Mattie[/name] for a little tomboy! I wouldn’t spell [name]Millie[/name], [name]Tillie[/name] or [name]Mattie[/name] with a y ([name]Milly[/name], [name]Tilly[/name] or [name]Matty[/name]) as I think the first two lose versatility with this change; I can see [name]Millie[/name] or [name]Tillie[/name] as a 15 year old, even a 20 year old. Can’t see [name]Milly[/name] or [name]Tilly[/name]. And [name]Matty[/name] I think is far too masculine, compared to [name]Mattie[/name].

[name]One[/name] of the girls I went to school with was a [name]Matilda[/name] who went by [name]Tilda[/name], I also knew a little girl called [name]Matilda[/name] who went by [name]Mada[/name] pronounced [name]May[/name]-dar because her older brother had a hard time saying [name]Matilda[/name] when she was first born, though she also went by [name]Tilla[/name].
I prefer the nickname [name]Tilda[/name] over [name]Mattie[/name]