In Jain context, Vishaldhar is a name used for a Viharman Tirthankar. As a word, it is generally understood as:

• Vishal = vast, great, expansive
• Dhar = holder, bearer

So, Vishaldhar means “the one who bears greatness / vastness” or “the great bearer.”

If you want, I can also explain who Shri Vishaldhar Swami is in Jain cosmology.