younger brother; little brother; brother-in-law (spouse's younger brother or younger sister's husband); (arch.) pupil; (arch.) apprentice
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
younger brother and sister
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
youngest brother; last disciple
biological younger brother
an apprentice system; apprenticeship
wise younger brother; polite reference to another's younger brother, or to one's junior
front company (for an organized crime operation)
filial piety; brotherly love
one's deceased younger brother
people in the whole world being all brothers; universal brotherhood
a foolish older brother and a smart younger
to quarrel among friends (or siblings)
both people are superb in skill (and thus it is hard to rank them)