Luke 9:8
And of some, that Elias had appeared; and of others, that one of the old prophets was risen again.
Cross-reference
Luke 9:19
Parallel
Luke 9:19 repeats the same popular opinions about Jesus' identity from the disciples, mirroring the reports Herod heard.
Mark 6:15
Parallel
Mark 6:15 gives the same report that Jesus is a prophet like those of old, matching the speculation here.
Mark 8:28
Parallel
Mark 8:28 records the same popular opinions about Jesus' identity, reported by the disciples.
Matthew 17:10
Historical context
Matthew 17:10 records the scribal teaching that Elijah must come first, underlying speculation that Jesus might be Elijah.
John 1:21
Parallel
John 1:21 has John the Baptist deny he is Elijah, while here people speculate that Jesus might be Elijah.