ɐlˈɔŋ wɪð hɪz twˈɪn bɹˈʌðɚ wˈɪljəm fɹˈæŋklɪn wˈɪlʌfbi, ɐn ɐkˈɑːmplɪʃt ɪkˈɑːnəmˌɪst ænd pəlˈɪɾɪkəl sˈaɪəntɪst, hiː bˈɔːt ɐ smˈɔːl ˈaɪlənd kˈɔːld ɛndjˈæŋ ˌɔn stˈoʊni lˈeɪk nˈɔːɹθ ʌv tɚɹˈɑːntoʊ ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪt, wˌɛɹ bˈoʊθ fˈæmɪliz spˈɛnt ðɛɹ sˈʌmɚz.
Along with his twin brother William Franklin Willoughby, an accomplished economist and political scientist, he bought a small island called Endiang on Stoney Lake north of Toronto in 1908, where both families spent their summers.