Complex sentence: The lion passant on the Kavanagh arms is a classic heraldic device associated with feudal power but unusual for a family of Gaelic extraction; it may be that it is intended to signify the centuries-long connection of the family with the kingship of Leinster.
Split into simpler sentences: The lion passant on the Kavanagh arms is a classic heraldic device associated with feudal power but is unusual for a family of Gaelic extraction. Perhaps it is intended to signify the centuries-long connection of the family with the kingship of Leinster.