健冶 (hiragana けんや, rōmaji Ken'ya)
Likely arose as a misspelling of 健治, regularly pronounced Kenji. Notice that the second character in that spelling has three strokes in the radical, as 氵, whereas this spelling has only two strokes in the radical, as 冫.
健冶 (hiragana けんじ, rōmaji Kenji)