# Ahaziah walked in the ways of

"Ahaziah lived the same way as the others in" 

# the house of Ahab

"the family of Ahab"

# what was evil in the sight of Yahweh

"what was evil in Yahweh's judgment" or "what Yahweh considers to be evil" 

# a son-in-law to the house of Ahab

"the son of Ahab's son-in-law" or "a grandson of King Ahab"