Street names in Denver are alphabetical.Some must begin with "X"
Xenia: n. Botany. The effect on a hybrid plant produced by the transfer of pollen from one strain to the seed of a different strain. [New Latin, from Greek, hospitality, from xenos, a guest, stranger, See xeno-.]
Not always.
On the west side, Denver seems to skip over "X" and "Y" while on the east side they doubled up on each letter.
There is not an obvious use of flora names for the streets on the east side. Concluding that Xenia was chosen as a non-Christian related name is not obvious.