Sketchbook owner's name?

[Rosinish]

I can't make up my mind as to whether the last letter of the surname is in fact a letter or a flourish like what looks like a 'B' at the end of 1850 

Annie

[bbart]

Could it be Carlton Callingwood?

Just throwing another name in 

Looby

My first impression was Carlton Collingwood, with the cross for the t going through the L in the first name.
Then I saw the posts about the first name being Caitlin, so I got too indecisive to post, so I'm glad to see I'm not the only one reading it as Carlton!

[mckha489]

The horizontal stroke in the first word looks just like the horizontal stroke in the t of September
so i don't like Carlton.

Am willing to concede Caitlin is a more modern name, but I think it is a derivative of Catherine and anyone named Catherine might have been called Caitlin even though that was not their baptismal name.

[Ruskie]

Is there any other writing in the same hand in the sketch book, so we can compare letter formation?

I still think this is a man's writing, though he may have been writing someone else's name.

[Karen McDonald]

I originally thought Carlton, too!

But as Mckha wrote, the "t" in September also changed my mind.

I was also under the impression that Caitlin was a newish name, but found this on the Web:

Etymology & Historical Origin - Caitlin
Caitlín is the Irish equivalent of Catherine and is generally pronounced “cotch-leen” (at least in the Gaelic tongue). The name was brought to the British Isles in the Middle Ages by way of the Norman French name Cateline. The Catherine family of names all derived from the Greek “Aikaterinë” (see Catherine) which translates to “pure one, clear, innocent.”

The more I look at the image, the less certain I am about it. At times I think it looks like the same name written twice, but without the horizontal stroke in the second one, and with a weird squiggle added to the end...

Hmmm...

Karen

[loobylooayr]

Perhaps if the books origins are Irish then it could be Caitlin 
It's certainly a name I'd associate with Ireland at that time.
Just don't know if it would be common elsewhere - although obviously today it's usage is widespread.

(I love the name, incidentally, and considered it when I was expecting my first baby - but I had a boy!)

Looby

[IJDisney]

Caitlin/en was also a surname, so this could be a double barreled name, rather than a first name and surname.

[Mike in Cumbria]

Caitlin Carlinford

[Rosinish]

Caitlin Carlinford

Good call but...
3rd letter of surname looks like an 'L'?

Maybe Callinford?

Annie