Updated June 9, 2019 Share: Family name origins & meanings Variant of Irish Breslin.Altered spelling of Swiss and South German Brüstlin, from a diminutive of Middle High German brust ‘chest’, ‘breast’ (see Brust).Americanized form of South German Brüslin, a nickname for a poor person, from an old dialect word Brüslin ‘crumb’.