See also the related category scandinavian.
Tamsin is rarely used as a baby name for boys. It is not listed in the top 1000 names.
Baby names that sound like Tamsin include Tamsyn, Tamen, Tamin, Tammen (English), Tangno (Welsh), Tangwyn (Welsh), Tannen, Tedman, Teman (English and Hebrew), Temen, Temin, Temman, Temon, Tenen, Thaman, Thamen, Thomeson, Thompson (English), Thomsen, and Thomson.
† English pronunciation for Tamsin: T as in "tee (T.IY)" ; AE as in "at (AE.T)" ; M as in "me (M.IY)" ; Z as in "zoo (Z.UW)" ; IH as in "it (IH.T)" ; N as in "knee (N.IY)"