fratribus
fratribus is a Latin form of frater, meaning “brother”. It is the ablative plural masculine noun or dative plural masculine noun.
Found 111 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.14.4: Vxores habent deni duodenique inter se communes et maxime fratres cum fratribus parentesque cum liberis; sed qui sunt ex his nati, eorum habentur liberi, quo primum virgo quaeque deducta est.
Lucan, Civil War 4.563: Fratribus incurrant fratres, natusque parenti,
All forms of frater (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.