Question

a theme expressed in both to my, dear loving husband and to the kings most excellent majesty is

Explanation:

Both poems express deep devotion—“To My Dear Loving Husband” to a husband, “To the King’s Most Excellent Majesty” to the king. Loyalty/devotion to a loved one/ruler is a shared theme.

Answer:

Devotion (or Loyalty, or Love and Respect for a Significant Figure)