I originally thought Caitlin but like Looby wondered if it was too modern. However, although it is in common usage today its origins were probably in the past. I believe it is Irish.
May I ask what the sketchbook contains, and whereabouts this signature is situated? Front page? Back page? Below a specific drawing? If so, what is that drawing of?
Are all sketches signed the same way? If so can you post more?
Sorry for so many questions, however I think this is a man's handwriting, so am trying to work out if 'Caitlin' might be the sitter (if this is a portrait). Alternatively, it may be a place name.
Where was the sketch book found? Eg it is a family relic and your family originated in Ireland? It was found at a car boot sale in Essex? Context may help.
