Slender or narrow
Kaulin is a modern phonetic variant of the Irish name CaolΓ‘n. It is derived from the Gaelic word 'caol', which translates to 'slender' or 'narrow', combined with a diminutive suffix. While rare in this specific spelling, it carries a long history in its original Irish form.
Less common today
Kaulin isn't in the latest US Top 1000. It last peaked at #5,941 in 2001.
US births per 5-year period, 1990βpresent (SSA data).