Akuti zaka mazana angapo zapitazo Columbus anapita ku America, Kalonga wina wa ku Wales dzina lake Madoc ananyamuka ku Wales ndi zombo khumi ndipo anali ndi maloto opeza malo atsopano. Madoc anali mwana wa Mfumu Owain Gwynedd, amene anali ndi ana ena aamuna 18, ena a iwo achiwerewere. Madoc anali m'modzi mwa opusa. Pamene Mfumu Owain inamwalira mu 1169, panabuka nkhondo yapachiweniweni pakati pa abale ponena za amene ayenera kukhala mfumu.
Madoc, munthu wamtendere, anasonkhanitsa gulu la anthu ena okonda mtendere ndikuyamba kufufuza malo atsopano. Malinga ndi nthanoyi, adabweranso mu 1171 ndi nkhani zaulendo wake ndipo adakopa anthu ambiri kuti apite naye paulendo wachiwiri, komwe sanabwerere.
Nkhaniyi, yomwe idalembedwa koyamba m'mabuku apamanja a Wales m'zaka za m'ma 1500, ilibe chidziwitso, koma anthu ena amakhulupirira kuti Madoc ndi amuna ake adafika pafupi ndi komwe tsopano ndi Mobile, Alabama.
Makamaka, mipanda yamiyala yomwe ili m'mphepete mwa mtsinje wa Alabama idakopa chidwi kuyambira pomwe idamangidwa Columbus asanafike, koma mafuko ena a Cherokee amati adamangidwa ndi “Anthu oyera” - ngakhale alipo zonena zina zochititsa chidwi kumbuyo nthano ya mafuko a Cherokee.
Malo omwe Madoc adatsikiranso akuti ndi "Florida; Newfoundland; Newport, Rhode Island; Yarmouth, Nova Scotia; Virginia; nsonga ku Gulf of Mexico ndi Caribbean kuphatikizapo pakamwa pa Mtsinje wa Mississippi; Yucatan; chisumbu cha Tehuantepec, Panama; gombe la Caribbean ku South America; zilumba zosiyanasiyana ku West Indies ndi Bahamas pamodzi ndi Bermuda; ndi pakamwa pa Mtsinje wa Amazon”.
Ena amalingalira kuti Madoc ndi otsatira ake anagwirizana nawo ndipo anatengeredwa ndi Amwenye Achimereka a ku Mandan. Mphekesera zingapo zikuzungulira nthano iyi, monga zomwe akuti zikufanana Chilankhulo cha Mandan ndi Welsh.
Ngakhale kuti miyambo ya anthu amavomereza kuti palibe mboni yomwe inabwerako kuchokera ku ulendo wachiwiri wa atsamunda kudzanena izi, nkhaniyo ikupitiriza kuti atsamunda a Madoc anayenda m'mitsinje ikuluikulu ya kumpoto kwa America, kukweza nyumba ndikukumana ndi mafuko ochezeka komanso osachezeka a Amwenye Achimereka asanakhazikike. kwinakwake ku Midwest kapena Great Plains. Akuti ndi amene anayambitsa zitukuko zosiyanasiyana monga Aaziteki, Amaya ndi Ainka.
Nthano ya Madoc idapeza kutchuka kwambiri panthawi yamasewera Nthawi ya Elizabethan, pamene olemba a ku Welsh ndi Chingerezi anagwiritsa ntchito kulimbikitsa zonena za ku Britain mu Dziko Latsopano motsutsana ndi aku Spain. Nkhani yoyambirira kwambiri ya ulendo wa Madoc, yoyamba kunena kuti Madoc anabwera ku America Columbus asanabadwe, imapezeka mu Humphrey Llwyd's. Cronica Walliae (lofalitsidwa mu 1559), chotengera cha Chingerezi cha Brut ndi Tywysogion.
Mayesero angapo otsimikizira mbiri ya Madoc apangidwa, koma akatswiri a mbiri yakale a ku America oyambirira, makamaka Samuel Eliot Morison, amawona nkhaniyi ngati nthano.
Bwanamkubwa John Sevier waku Tennessee adalemba lipoti mu 1799 lofotokoza za kupezeka kwa mafupa asanu ndi limodzi atakutidwa ndi zida zamkuwa zokhala ndi zida za ku Welsh, zomwe mwina zinali zabodza. Zikadakhala zenizeni, zikadakhala umboni wotsimikizika kwambiri womwe tili nawo wokhudza tsogolo la ulendo wa Madoc, womwe ukadali chinsinsi.
