pupil; disciple; adherent; follower; apprentice; young person
siblings; brothers and sisters; brothers; siblings-in-law; brothers-in-law; mate
older sister and younger brother
royal prince; crown prince's younger brother
brother-in-law (spouse's younger brother or younger sister's husband); younger stepbrother
children; sons; (lit.) children and younger brothers; young people
one's younger brother; underling (e.g. in yakuza); junior male peer; sworn younger brother
disciple; pupil; follower
(one's) younger brother; foolish younger brother
best pupil; leading disciple
filial piety; brotherly love
one's deceased younger brother