Complex sentence: The name has never been very popular in the United States where, according to Social Security Administration records, from 1880 to 1914 it's highest ranking of girls' names was 612 out of 1,000 in 1886.
Split into simpler sentences: The name has never been very popular in the United States. From 1880 to 1914, according to Social Security Administration records, it never ranked higher than 612th in 1886.