I'm not that thrilled with naming the park Hollywoodland myself, but to be fair Walt only named one theme park in his life before he died in 1966.
And the one name he came up with wasn't all that creative since the branding concept of "land" after a place name or proper name had already existed for decades prior to Walt coming up with "Disneyland" as the name for his park. Just in SoCal alone,
Marineland opened a year before Disneyland did and
Jungleland had opened in 1926, a year before Walt even arrived in California.
Playland opened in 1928, a year after Walt arrived.
In Walt's youthful stomping ground of Chicago in the 1910's and 20's, there was
Joyland and
Kiddieland as two local amusement parks he may have visited as a teenager. Even the popular name for the metro area "
Chicagoland", was a name invented and first used in the Chicago Tribune in 1926, and was widely in use by the 1930's.
Naming his own park "Disneyland" in 1955 wasn't much of a creative stretch. But it sure found a fan base quickly.