9. No.
In the 1890s, Ethel was the 8th most common name among female American babies - over 6,000 of every million girls born were given this name each year. After that, it fell precipitously. By the 1920s, it had fallen to about 2,000 per million, and by 1970, it was under 100 per million. If you're still alive, and your name is Ethel, the likelihood is that you're 80 years of age or over.
Olive was never as poplar a name as Ethel. At its peak in the 1880s, about 1200 girls per million were being named Olive, making it the 88th most popular name in the US. By the 1930s, fewer than 100 girls per million were being named Olive, and it disappeared from use until this decade, when it made a re-appearance. So you have essentially a bimodal distribution for the name Olive - a bunch who are over 80 and a bunch who are under 10, meaning the average is somewhere in the 40s or 50s, much lower than for Ethel.