Lyneah is of American origin, derived from the combining form 'lyn' and the suffix '-ae'. It is often considered a variant spelling of Leanah or Laynah, which are also American names. The popularity of Lyneah has been relatively steady over time, with peaks in usage occurring in the late 20th century.
"The name Lyneah saw a significant increase in popularity between 2009 and 2013, with only 5 babies named Lyneah born in 2009, compared to 11 in 2013. This trend continued into 2014 with another 7 births recorded that year. In total, there have been 23 babies named Lyneah since 2009."