Details for baptism for Joseph Tear in Sheffield:
Born 13 March 1898, baptised 23 March
Parents: Joseph & Caroline
Abode: 6 Rough Bank
Father's occupation: Turner and fitter
In his army service records, Joseph East indicates his next-of-kin is Caroline North (mother) and Lottie East (sister).
I think her name is Lottie. 
Is this mum Caroline below?
Yorkshire, Sheffield Crime Courts And Convicts 1737-1938Name: Caroline East
Birth year: 1877
Event date: 10 Mar 1894
Other details: Wandering abroad
Source document: Sheffield, Magistrates Court Register