What is the name that begins with the letter C?

The name that begins with the letter C is "Charlie." This name is commonly used in various contexts, including as a phonetic alphabet representation (where 'C' represents Charlie) and is also a popular name for individuals. The other names listed—Henry, George, and Ida—begin with different letters (H, G, and I respectively) and therefore do not meet the criteria of starting with the letter C. Hence, "Charlie" is the correct choice, as it directly aligns with the question's requirement.