Yes, it was Joaquin Miller, one of the horde of Western writers that the English delight in showing off to one another.

Selected Writings of Joaquin Miller.

The first tree was planted for Joaquin Miller.

In 1883, Joaquin Miller (1837-1913) moved to Washington, DC to get involved in politics.

Joaquin Miller explained in Sunset (magazine) in 1904 how Oregon's name was derived:

Coolbrith befriended the poet Joaquin Miller and helped him gain global fame.

There's Joaquin Miller, lives out in the hills back of Fruitvale.

In 1907, Joaquin Miller visited the caves.

The lake is described in the poetry of Joaquin Miller.

In January 1886, Wagner changed to monthly publication, and hired Joaquin Miller as editor.