Planning for siblings in advance?

Hello all. My husband and I are working on naming our first, but want to have some kind of plan for an eventual sibling group (we are thinking three kids, time will tell).
Our idea list is as follows:

[name_m]Henry[/name_m] [name_m]Martin[/name_m] - [name_m]Henry[/name_m] [name_u]Michael[/name_u]
[name_m]Marshall[/name_m] [name_m]Thomas[/name_m] - [name_m]Marshall[/name_m] [name_u]Reed[/name_u]
[name_m]Martin[/name_m] [name_u]Reed[/name_u] - [name_m]Martin[/name_m] [name_u]Shawn[/name_u]
[name_m]Jacob[/name_m] [name_u]Michael[/name_u] - [name_m]Jacob[/name_m] [name_m]Thomas[/name_m]

[name_f]Hanna[/name_f] Valerine - [name_f]Hanna[/name_f] [name_u]Reed[/name_u]
[name_f]Norah[/name_f] Valerine - [name_f]Norah[/name_f] [name_f]Louise[/name_f]
[name_f]Sophia[/name_f] [name_f]Kate[/name_f] - [name_f]Sophia[/name_f] [name_f]Helene[/name_f]
[name_f]Isabel[/name_f] [name_u]Reed[/name_u] - [name_f]Isabel[/name_f] [name_u]Shawn[/name_u]

We have stuck to family names as middle names. [name_f]Do[/name_f] you like some more than others? Or do some have an odd ring?

Our last name starts with a G.

I like [name_m]Martin[/name_m]! It’s handsome and classic but currently out of style. [name_m]Henry[/name_m] and [name_m]Jacob[/name_m] are also fine but popular. [name_m]Marshall[/name_m] feels really dated to me.

I think [name_f]Hanna[/name_f], [name_f]Norah[/name_f], and [name_f]Isabel[/name_f] would get misspelled a lot; I would use [name_f]Hannah[/name_f], [name_f]Nora[/name_f], and [name_f]Isabelle[/name_f].

I love [name_m]Marshall[/name_m], especially [name_m]Marshall[/name_m] [name_u]Reed[/name_u]. [name_f]Norah[/name_f] is nice too and I think [name_f]Isabel[/name_f] [name_u]Reed[/name_u] is very striking.