余温

residual heat; remaining warmth / (fig.) lingering enthusiasm

surname Yu

(archaic) I / me / variant of 餘|余[yu2], surplus

extra / surplus / remaining / remainder after division / (following numerical value) or more / in excess of (some number) / residue (math.) / after / I / me

surname Wen

warm / lukewarm / temperature / to warm up / mild / soft / tender / to review (a lesson etc) / fever (TCM) / old variant of 瘟[wen1]