Jonson rhymes with:
johnsen, johnson, jonsson, antonsen, bahnsen, bronson, johansson, johnsen, johnson, jonsson, monsen, monson, ronson, swanson, thronson, wisconsin
Jonson sounds like:
jainism, jamaican, jameson, jamieson, jamison, jansen, jansma, janson, janssen, jansson, janzen, jeansonne, jemison, jenison, jenkin, jennison, jensen, jenson, jenssen, jimison, jingoism, johannesen, johannessen, johannsen, johansen, johanson, johansson, johnsen, johnson, jonassen, jonsman, jonsson, jungin, jungman, junkin, junwuxiyan