Bastarache (French pronunciation: [bas.ta.ʁɑʃ]) is a French surname of Basque origin.
It was formed as a patronym of Basterreche, which itself is a topographic name for someone who lived in a house by a boundary, or on the edge of a settlement or the corner of a street.
[1][2] It is ultimately derived from Basque bazter ("border", "edge") and eche ("house").
It was one of the original Acadian surnames.
[3][4] Notable people with this surname include: The hamlet of Bastarache in Sainte-Marie-de-Kent, New Brunswick was named after early settlers Joseph Bastarache, Isidore Bastarache or Peter Bastarache, or after Adrien Bastarache, the first postmaster.