1. Jacob is a popular name for boys in English-speaking countries. It is of Hebrew origin and means "supplanter". Many parents choose this name because of its biblical significance and its strong, classic sound. Jacob has been a top name for boys for several years and continues to be a popular choice.

2. James is another popular English name that starts with the letter J. It is derived from the Hebrew name Jacob and means "supplanter" as well. James has a royal connotation, as it has been the name of various kings in history. The name has a timeless appeal and is a favorite choice among parents.

3. John is a traditional English name that has been in use for centuries. It is derived from the Hebrew name Yochanan and means "God is gracious". John is a strong and simple name that has a timeless quality. It has been a popular name for boys throughout history and continues to be a classic choice.

4. Joshua is a biblical name that starts with the letter J. It means "God is salvation" in Hebrew. Joshua was a prominent figure in the Old Testament, known for leading the Israelites into the Promised Land. The name has a strong, heroic sound and has been a popular choice among parents.

5. Justin is a modern English name that has gained popularity in recent decades. It is derived from the Latin name Justinus, which means "just" or "upright". Justin has a cool and contemporary sound, and it appeals to parents who are looking for a name that is both traditional and unique.

In conclusion, there are several English names for boys that start with the letter J. Jacob, James, John, Joshua, and Justin are just a few examples. These names have different origins, meanings, and connotations, but they all share a certain timeless quality that makes them appealing to parents. Whether you prefer a classic, biblical name or a more modern and unique choice, there is a J-name that will suit your taste and style.