Scrip / Convert / Double-Struck
𝕋𝕙𝕖 𝕢𝕦𝕚𝕔𝕜 𝕓𝕣𝕠𝕨𝕟 𝕗𝕠𝕩
Double-struck (blackboard bold) letters carry the skeleton strokes of chalkboard notation teachers use for number sets. Converting a name gives it that instantly mathematical, hand-chalked feel.
Where it's used: Set-theory posts, math study groups, usernames with an academic edge.
Unicode block: Covers U+1D538–U+1D56B; C, H, N, P, Q, R and Z use the classic precomposed set glyphs ℂ ℍ ℕ ℙ ℚ ℝ ℤ.