The present study includes a family (Family 407 L; Table S2) previously reported to carry a potential disease‐causing variant in PUM1 (Family X; NM_001020658.2: c.3103A>T (p.Thr1035Ser)) associated with the adult‐onset ataxia segregating in a multi‐generational family [23]. Here, PUM1 is linked to Ataxia.