Middle suggestions for Regen?

Purely hypothetical at this point, but I’m starting to look at baby names again…

I’m really liking [name_m]Regen[/name_m] (pr. [name_f]REE[/name_f]-gen) for a boy right now, partly because it ties back to my [name_m]German[/name_m] heritage (it’s the [name_m]German[/name_m] word for rain, and [name_m]Regen[/name_m] is a town in Bavaria) and I just like the sound of it, not too popular but definitely not unheard of.
However I’m having a bit of trouble coming up with middle names that sound good with it…I like [name_m]Regen[/name_m] [name_u]Brennan[/name_u] and [name_m]Regen[/name_m] [name_u]Tate[/name_u], but I’d like some more options.

Any suggestions?

[name_m]Regen[/name_m] [name_m]Alistair[/name_m]
[name_m]Regen[/name_m] [name_m]Ambrose[/name_m]
[name_m]Regen[/name_m] [name_u]Blake[/name_u]
[name_m]Regen[/name_m] [name_m]Thaddeus[/name_m]
[name_m]Regen[/name_m] [name_m]Oliver[/name_m]
[name_m]Regen[/name_m] [name_u]Spencer[/name_u]
[name_m]Regen[/name_m] [name_m]Tobias[/name_m]
[name_m]Regen[/name_m] [name_u]Bentley[/name_u]
[name_m]Regen[/name_m] [name_m]Bennett[/name_m]
[name_m]Regen[/name_m] [name_m]Malachi[/name_m]

Thank you jariel, I really like your suggestions of [name_m]Regen[/name_m] [name_m]Alistair[/name_m] and [name_m]Regen[/name_m] [name_m]Bennett[/name_m].

After thinking about it a bit more, I realised the subtle connection the name [name_m]Regen[/name_m] would have with my one year old [name_f]Siena[/name_f], as they’re both names of European towns - which is purely coincidental - but I think it’s a nice link without being matchy.