import unicodedata


def greek_letter_name_to_unicode(letter):
    """
    Return a greek letter name as a Unicode character.

    Examples
    --------
    Lamda -> Λ    (Unicodedata library uses "lamda" for "lambda" :S!)
    Omega -> Ω
    omega -> ω
    """
    return unicodedata.lookup(
        "GREEK {case} LETTER {name}".format(
            case="SMALL" if letter == letter.lower() else "CAPITAL", name=letter.upper()
        )
    )