First and last name have same ending.

[Giles1008]

I have loved the name Caspar/ Casper ever since we had first our son but our surname ends with ‘er’.

The sounds are different, Caspar with more of an ‘a’ ending, whilst our surname is pronounced with an ‘ur’ sound.

Can I call our son Caspar Prisher (example isn’t actually our surname).

Am I over thinking this? I could go for the Caspar spelling.

I think it’s fine.
An alternative could be Caspian. But I think you are fine with what you’ve chosen.

I like it.

Hmm it might be fine but I agree that a name ending in a consonant might work better
Caspian Prisher or Quentin Prisher or Reuben Prisher sounds better than Casper Prisher imo

I think it depends a bit on the first syllable of your surname- Caspar Parker sounds a bit sing-songy, Caspar Fisher does not.

Casper is a ghost! Sorry noooo

I know someone who adopted a child and gave him their surname, which meant both names had the same fairly distinctive ending (think something like Grenville Woodville). It didn't seem to make either of them unhappy. I also think the -er sound is much less distinctive and nobody would really think about it much. I bet you've known someone called something like Peter Brewer and not thought it sounded odd.

For what it's worth, I much prefer the spelling Caspar to Casper, and I pronounce them both exactly the same.

It’s alright but Cassian or Caspian or Cassius will all sound better

.. I don’t think it matters if you spell it Casper or Caspar, it’s how it sounds that is the slight issue.

I think it's too singsongy. Cassius would be a nice alternative.

Our first born has this exact sound combination (first name ah and surname ur), can't say it seems to have ever bothered him or us 😁