Can Valkur be made a ranger deity?

[Task]

I recently discovered that the reason I couldn't make Valkur the deity of my character was that he's a ranger. Being a sailor, I chose Umberlee since Valkur wasn't on the list. Could this be changed to allow Valkur? I don't see why one would be available for rangers and not the other. I looked at the list of ranger deities and even Leira is on the list, despite having nothing to do with nature.

[Luna]

Any DM want to flag this?

[Simian]

I am not a DM on the server, but one in PnP:

Ranger:

Vast areas of Faerun are covered with ancient forests and populated by fantastic creatures. The rangers of Faerun, along with the druids, occasional barbarians, and clerics of deities such as Silvanus and Mielikki, are the masters of the "empty" spaces.

Unlike clerics, druids, and paladins, Faerunian rangers do not have to choose a patron deity until they reach 4th level and acquire divine spellcasting ability (without a patron deity, a ranger cannot cast spells). Many rangers choose a patron deity before then, but others start by devotion to the ranger's way of life instead of to one of the gods. Rangers and druids have similar prefrences for deities, although some rangers with odd interests (such as hunting undead) choose different patrons.

Good rangers of the North often find themselves acting in concert with groups such as the Harpers, and some eventually join that organization. However, not all rangers of Faerun are good, and places such as the forest of Cormanthor and the High Forest are a battleground-good rangers who seek to defend the forest and its inhabitants against evil rangers who follow deities that find it natural to inflict pain on others.

Rangers may select an organization instead of a creature type as a favored enemy. for example, a good ranger might choose to oppose the Cult of the Dragon, and dark Zhentarim rangers often hunt the Harpers. These rangers receive their favored enemy bonus against agents from the organization, regardless of creature type. The bonus applies even if the creature is of the same race as the ranger and the ranger is not evil. The bonus works just like the normal favored enemy bonus, except that it is considered a morale bonus and does not stack with other morale effects.

Therefore, yes, all deities should be available to the Rangers.

(There are NWN2 PWs that have done just that by editing the .2da files.)

/// Rangers should have all deities selectable, as per the line "Rangers and druids have similar prefrences for deities, although some rangers with odd interests (such as hunting undead) choose different patrons."