Unicode Lambda λ
Unicode lambda is named lamda, no b
Interesting that in unicode, the character lambda is named lamda, sans the b, except one of them.
this lambda has the b:
- ƛ U+19B: LATIN SMALL LETTER LAMBDA WITH STROKE
the following do not:
- Λ U+39B: GREEK CAPITAL LETTER LAMDA
- λ U+3BB: GREEK SMALL LETTER LAMDA
- ᴧ U+1D27: GREEK LETTER SMALL CAPITAL LAMDA
- 𐎍 U+1038D: UGARITIC LETTER LAMDA
- 𝚲 U+1D6B2: MATHEMATICAL BOLD CAPITAL LAMDA
- 𝛌 U+1D6CC: MATHEMATICAL BOLD SMALL LAMDA
- 𝛬 U+1D6EC: MATHEMATICAL ITALIC CAPITAL LAMDA
- 𝜆 U+1D706: MATHEMATICAL ITALIC SMALL LAMDA
- 𝜦 U+1D726: MATHEMATICAL BOLD ITALIC CAPITAL LAMDA
- 𝝀 U+1D740: MATHEMATICAL BOLD ITALIC SMALL LAMDA
- 𝝠 U+1D760: MATHEMATICAL SANS-SERIF BOLD CAPITAL LAMDA
- 𝝺 U+1D77A: MATHEMATICAL SANS-SERIF BOLD SMALL LAMDA
- 𝞚 U+1D79A: MATHEMATICAL SANS-SERIF BOLD ITALIC CAPITAL LAMDA
- 𝞴 U+1D7B4: MATHEMATICAL SANS-SERIF BOLD ITALIC SMALL LAMDA
[see Unicode: Greek Alphabet α β γ]
here's interesting things about lambda

apparently, it's pronunced with b in ancient times.
pronunciation as [laːbdaː] (λάβδα) in Classical Greek times. In Modern Greek the name of the letter, Λάμδα, is pronounced [lamða].
also note, its relation with Latin letter L and Phoenician letter Lamd 𐤋 and the Cyrillic letter El Л л