Jansen rhymes with:
janson, janssen, jansson, ansohn, anson, branson, canson, danson, fransen, franson, franssen, gansen, ganson, hansen, hanson, hanssen, hansson, janson, janssen, jansson, johannsen, johansen, johanson, manson, ranson, ransone, sanson, sansone
Jansen sounds like:
jainism, jamaican, jameson, jamieson, jamison, 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, jonson, jonsson, jungin, jungman, junkin, junwuxiyan