Buenechea is the Spanish spelling of a Basque surname which also occurs in the variants Bonechea, Buonechea, Boenechea and Bonachea.
bjˈuːənˌɛtʃiə ɪz ðə spˈænɪʃ spˈɛlɪŋ əvə bˈæsk sˈɜːneɪm wˌɪtʃ ˈɔːlsoʊ əkˈɜːz ɪnðə vˈɛɹiənts bˈoʊntʃiə, bjˈuːoʊntʃˌiə, bˈoʊnɪtʃˌiə ænd bˈɑːnɐʃˌiə.