brotherly
adjective
[ ˈbrʌðəli ]
• characteristic of or appropriate for a brother or brothers; fraternal.
• "he and I had such a brotherly bond"
Similar:
fraternal,
sibling,
friendly,
affectionate,
amicable,
kind,
kindly,
devoted,
loving,
loyal,
cordial,
sympathetic,
comradely,
philanthropic,
charitable,
altruistic,
chummy,
pally,