Does this clash?

[sleepypandaeyes]

Love Micah for a boy. Would it clash with a surname beginning with a C; a "Cuh" sound?

Yeah

Yep

Probably

It sounds like it

How many syllables in the surname?

Depends on the name. Would be ok if something like Chan or Chappell but not Cox or Carr.

Too syllables beginning with Cuh sound

It's difficult to say without the actual name, but if it is something akin to Chapman, I think it would sound just fine

So like micah cuthbert or similar?

It's a bit difficult to get your tongue round but not that bad I don't think.

I love a consonant echo, like Bridget Badot or Lily Alderton, I think sounds lovely and is memorable.

I think the cuh sound might make it sound clunky.

Micah Cunningham or Micah Curtis for example, don't roll off the tongue easily.

Yes

Hard to tell without the exact surname but I think it would be ok. I have a similar issues with my own name (but different letter sound) since I changed my surname. I find I have to annunciate a bit more than with my maiden name but otherwise no issues