Proved on 29 January (not 30).
Line 1 … xxix Januarij 1566 Jura(men)t(is)
Line 2 … testiu(m) &c
I would go for Sprakleye or Sprakleyes.
Like Vance, I think it's Selbrond in the probate, Colbrand in the will, but different hands, and neither is a signature, so it's down to the interpretation of two different clerks.