He is your Father in law.
your father-in-law's house
Try a phone call
you poor soul
Your father's brother's son is your first cousin. The English language does not have a name for the wife of a cousin. You would simply refer to her as "my cousin's wife."
An orphan
Your half-brother...
I think you mean 'Otosan'. This means 'Dad' or 'Father'. I get the impression from my study that wifes sometimes call their husband 'Otosan'.
Mother in-law
Sugar Daddy
Because it was his wifes name.
Your grandmother's brother's wife is your great aunt.
Harolds wifes asistents found him