Freckled or speckled
Breckan is a modern spelling variant of the Irish name Breccan. It is derived from the Gaelic word 'breac', which means speckled or variegated, originally used to describe someone with freckles.
Less common today
Breckan isn't in the latest US Top 1000. It last peaked at #5,143 in 2013.
5th-century Irish saint and founder of Ard-Braccan
US births per 5-year period, 1990βpresent (SSA data).