# When he came to the house

"When they came to the house." Jesus went there with Jairus. Also some of Jesus' disciples went with them.

# he allowed no one ... except Peter and John and James, and the father of the child and her mother

This could be stated positively. Alternate translation: "Jesus allowed only Peter, John, James, and the girl's father and mother to go inside with him"

# the father of the child

This refers to Jairus.