Section divided into 2 or more staves

Hello! I searched the forum and I couldn't find anything that would help me in an effective way.

I have this score which, at some point, all the instruments in the strings section are going to be divided between FIRST STAND and ALTRI, but I have no idea on how to do it in a way that it's not a text on the first bar of every system on every instrument.

A very common and simple solution is to treat the section like a multi-staff instrument, even with the brackets on the start of every system, but the problem is that I can't find a way to name that multi-staff instrument >and< the individual staves at the same time.

Any ideas?

I came up with this but the VIOLINOS 1 is just a text on the first bar, which makes it very unstable.

Thanks!