Bright Stars:

* Hadar (Beta Centauri): The second brightest star in the constellation Centaurus, a blue-white supergiant.

* Hamal (Alpha Arietis): The brightest star in the constellation Aries, an orange giant.

Other Notable Stars:

* Hachiko (HIP 104143): This star is named after a famous loyal dog.

* HD 189733: An exoplanet was discovered orbiting this star.

* HIP 56948: One of the closest stars to our solar system.

* HR 8799: This star is known to host a system of four exoplanets.

Stars in Constellations:

* Hydra: This constellation has many stars beginning with the letter H, including Alphard (Alpha Hydrae), Hydrae, and Hydrae.

* Hercules: This constellation includes stars like Herculis and Herculis.

Note: There are many other stars starting with the letter H, but these are some of the most notable ones. You can find a comprehensive list of stars with their names and information on star catalogues and astronomy websites.