Amandil is a fictional character from J.R.R. Tolkien's Middle-earth legendarium. Amandil was a Lord of Andúnië, succeeding his father Númendil upon his death. Amandil is most noted for being the father of Elendil, founder of the Númenórean Realms in Exile.
Amandil doesn't know who Tolkien is.
Amandil is a fictional character so there's no way that he would know who his creator, Tolkien is.