Nounbrothers and sisters; siblings · half-siblings; step-siblings; siblings by marriage or adoption · mate; friend

Nounolder brother; elder brother · young man; buddy; fella; laddie

Nouncousin (male)

Nounbrother-in-law (spouse's older brother or older sister's husband) · older stepbrother

Nounelder brother · one's senior · older man; man older than oneself