Siebrecht rhymes with:
eggebrecht, engelbrecht, giesbrecht, helmbrecht, lambrecht, lebrecht, obrecht, ulbricht, vollbrecht, district, eggebrecht, engelbrecht, giesbrecht, helmbrecht, lambrecht, lebrecht, obrecht, ruprecht, ulbricht, vollbrecht
Siebrecht sounds like:
seabright, seafirst, severest, shipwright, sobriquet, sparked, sprigged, sprocket, spruced, suffragette, suffragist, supercut, superoxide, supersede, superseded, suppressed