First and last and One and only

First and last adverb - Taking everything together.

One and only and first and last are semantically related in someone adored topic. In some cases you can use "One and only" instead a noun phrase "First and last".

One and only adjective - Eminent beyond or above comparison.

First and last and one and only are semantically related in dear topic. You can use "First and last" instead a noun phrase "One and only", if it concerns topics such as prize, someone adored.