Long hill or ridge
A modern spelling variation of the English surname and place name Landon. It is derived from Old English elements meaning 'long hill', originally used to describe someone living near such a geographical feature.
Less common today
Landynn isn't in the latest US Top 1000. It last peaked at #5,482 in 2015.
US births per 5-year period, 1990βpresent (SSA data).