Will not judge you by your medals and diplomas, but by your scars...
Maybe "Skybreakers"? First thing that comes to my mind is sky with clouds based on colours.
How old is your son? They look really good!
I don't have any immediate ideas for a name, but they do look like UM Successors, with Company colour on the helmet to me -- not that that helps much with the name.
I'd suggest trying the name generator on B&C, ( [URL="http://www.bolterandchainsword.com/liber/CantinaChapterCreator.html"]http://www.bolterandchainsword.com/liber/CantinaChapterCreator.html[/URL] although some of those names can be a little odd ...
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And welcome to BOLS!
What is the design painted on the banner? May help come up with a name. Looks like a red scimitar?
In the nightmare future of the 41st millennium, there is no time for peace. No respite. No Balance. There is only War.
I like Nova Griffons (Gryphons... depends on spelling taste). You could very easily use the red sword (scimitar) as part of a chapter honor. Maybe they quelled an uprising of heretics on their homeworld, or some off-world back-water planet. Look me up if you need chapter badges designed.
First thing I can think of is 'Skybreakers' due to colour schema.
I'm feeling.... Astral Sabers (or Sabres, if you prefer). Or the Lions Rampant.
Ivory Bulwark?
Red Sabers
Crimson Sabers
Warriors of the Red Sword
Knights of the Red Blade
The Blooded
The Chosen
Beheaders
Swords of Doom
Swords of Wrath
Swords of Penitence
Swords of Justice
na na na na na... wut?
gost fayct killaz
mareenz og
pacs rayderz
owtlawz
kush kloudz
hood up
rite sy fy naymz rite der dawg. demz stryk feer into heretikz hartz na mean?