The Muthill parish register of Baptisms gives details of all baptisms between 1697 and 1847, with an index to save you lots of time. The details given include, date baptised, parents names, place of birth and date born. It is important to note that not only is the Father's name given but also the Maiden name of the Mother. This book can provide you with lots of leads.
Example: Jan 9 1709 Jean daughter to David Marshall and Isobel Lauson at Innerpafray born Jan 8.