Ottman rhymes with:
brotman, cotman, cottman, gottman, hottman, lottman, rotman, rottman, rottmann, schlottman, totman, trotman
Ottman sounds like:
o'donohue, oatman, odden, odem, oden, odeon, odiaum, odiaun, odin, odom, odonohue, odum, ooten, otani, othman, otten, ottoman, ottum, outdone, outen, outman, outten