For the title holder, in this case the Earl of Lovelace, they are often referred to ("styled") simply by the place name. So after William King-Noel was created

For the title holder, in this case the Earl of Lovelace, they are often referred to ("styled") simply by the place name. So after William King-Noel was created Earl.of Lovelace he was styled "Lovelace". She would have been styled "Lady Lovelace" in society, and "Countess of Lovelace" in formal contexts