Answer

In Jain tradition, the direct connection with Lord Neminath is Varadatta Svami, who is described as Neminath’s chief ganadhara, not Dattatreya. The Dattatreya name appears more as a later local and regional association with Girnar, where the Jain sacred peak of Neminath also came to be known by that name in some traditions. ( jainqq.org)

Explanation

So, if you are asking about Jain granths, the safest answer is: I do not find Dattatreya as the main canonical Jain figure in Neminath’s story. The Jain sources I found clearly mention Varadatta Svami as Neminath’s principal disciple, while later writings about Girnar speak of a “Dattatray or Neminath” peak. That suggests a later overlap of names and sacred geography, not the original Jain identity of Lord Neminath. ( jainqq.org)

Spiritual Understanding

For Jains, Girnar/Ujjayanta is holy because it is associated with Bhagwan Neminath’s renunciation and liberation. His spiritual assembly is linked with Varadatta Svami. The Dattatreya association seems to be a later historical layering on the same sacred mountain, rather than a core Jain teaching about Neminath. ( jainqq.org)

Takeaway

Short answer: the Jain relation is with Varadatta Svami, not Dattatreya directly; Dattatreya became associated later with the Girnar area in overlapping local tradition. ( jainqq.org)

If you want, I can also explain the story of Lord Neminath and Varadatta Svami in simple Jain language.