Olaf Stigvason

Olaf Stigvason was a famous warrior from Skellige's islands. Ciri was fatally in love with him when she was 10 years old. Problem was that in time Olaf already had 35 years, he was married and had children older than Ciri. Love was therefore hopeless and desperate thus Ciri attempted to suicide by drowning herself. However she had to wait long for favorable weather and during the waiting she got through it and thoughts on worst left her.

Source

 * Ciri's genalogy - Cirilla