Complex sentence: He laid claim to the Irish baronetcy of Cox of Dunmanway, and styled himself with the honorific'Sir', however, after his death, the Privy Council rejected his son's claim to the baronetcy.
Split into simpler sentences: He laid claim to the Irish baronetcy of Cox of Dunmanway, and styled himself with the honorific'Sir'. However, after his death, the Privy Council rejected his son's claim to the baronetcy.