Thomas Alexander Lammonby (born 2 June 2000) is an English cricketer who plays for Somerset.

[2] Prior to his T20 debut, Lammonby was named in England's squad for the 2018 Under-19 Cricket World Cup.

[5] Lammonby scored his maiden century in his fourth first-class match, against Gloucestershire at Taunton.

[7] In the 2021 T20 Blast, Lammonby scored a "freewheeling" 90 runs off only 36 balls to help Somerset to a 23-run win over Gloucestershire.

[8] In December 2021, Lammonby was picked up by the Hobart Hurricanes after playing grade cricket in Sydney.