Ketron rhymes with:
austron, beltran, bertran, buitron, catron, cintron, citron, coltrane, datron, doctrine, dyatron, dynalectron, intron, matron, patron, pentron, quotron, rostron, sumatran, vestron, wiltron
Ketron sounds like:
katarina, katharina, katharine, katherine, kathryn, katrina, ketterman, kitterman, kudrna