Siemsen rhymes with:
abrahamsen, abrahamson, abramson, adamson, bramson, clemson, damson, flamson, hamson, harmsen, hermsen, jameson, lambson, lamson, malcolmson, malcomson, remsen, remson, rimson, rumson, samson, simson, stimson, thomsen, thomson, timson, tomson, wilhelmsen, willemsen, williamsen, williamson
Siemsen sounds like:
samsom, samson, san-juan, sang-gon, sanguine, sanjuan, sansom, sanson, sansone, sanzone, schenken, semicon, senseney, shamanism, shangkun, shanken, shankman, shawinigan, shenanigan, shenkman, shenzhen, simenson, simison, simkin, simonsen, simonson, simonsson, simson, singin', skonieczny, snecma, sonnenschein, sunken, sunshine, sunshiny, swanigan, swanson, swensen, swenson, swinson, syncom, syngman