Who is Jill's first husband?

Jill Biden's first husband was Bill Stevenson.

Jill Biden's Marriage History

Jill Tracy Jacobs, widely known as Jill Biden, has had two marriages. Her initial marriage was to Bill Stevenson, which lasted for several years before her subsequent marriage to Joe Biden.

Here's a summary of her marriages:

Bill Stevenson and Jill Biden were married in 1970 and their marriage concluded with a divorce in 1975. Following this, she married Joe Biden in 1977.